{"title":"Seiko Mod Cases","description":"\u003cp\u003e21 stainless steel mod cases across four platforms: \u003ca href=\"\/en-ca\/collections\/nautilus-style-parts\"\u003eSeikonaut \/ Nautilus Ultra-Thin\u003c\/a\u003e (40 mm), \u003ca href=\"\/en-ca\/collections\/petrichor-style-parts\"\u003ePetrichor\u003c\/a\u003e (37 mm), \u003ca href=\"\/en-ca\/collections\/royal-oak-style-parts\"\u003eRoyal Oak 41 mm\u003c\/a\u003e, and Royal Oak 37 mm V2. Every case ships with a sapphire or domed sapphire crystal, screw-down crown, and water resistance from 50 m to 100 m. All cases accept Seiko NH35, NH36, NH70, NH71, and NH72 movements out of the box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMovement compatibility:\u003c\/strong\u003e Every case in this collection fits the full NH35 family (NH35, NH36, NH38, NH34 GMT) and NH70 skeleton family (NH70, NH71, NH72). No adapter or spacer needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDial fit:\u003c\/strong\u003e Seikonaut and Royal Oak 41 mm cases take 30.8 mm dials. Petrichor and Royal Oak 37 mm V2 cases take 28.5 mm dials. Check the \u003ca href=\"\/en-ca\/blogs\/seiko-mod-parts\/28-5mm-vs-30-8mm-seiko-dials-which-should-you-choose\"\u003edial size guide\u003c\/a\u003e before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWatch out:\u003c\/strong\u003e Dial size is the most common mistake in Seiko modding. A 28.5 mm dial will not fit a Seikonaut case, and a 30.8 mm dial will not fit a Royal Oak 37 mm. Always match the dial diameter to your case platform.\u003c\/p\u003e\n\u003ch2\u003eHow to Choose Your Case\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStyle:\u003c\/strong\u003e The Seikonaut delivers a Nautilus-inspired silhouette with integrated lugs and a horizontally ribbed bezel. The Petrichor is a dressy 37 mm design with a domed sapphire crystal and slim 9.95 mm profile. The Royal Oak 41 mm offers the classic octagonal bezel at a sportier size with 100 m water resistance. The Royal Oak 37 mm V2 brings the same octagonal DNA into a more compact, wrist-friendly package at 9.95 mm thick.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSize:\u003c\/strong\u003e The Petrichor and Royal Oak 37 mm V2 both wear at 37 mm and sit under a shirt cuff comfortably. The Seikonaut at 40 mm hits the modern sweet spot. The Royal Oak 41 mm wears larger at 41 × 51 mm with a 12.2 mm thickness — best for wrists 17 cm and above.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMovement choice:\u003c\/strong\u003e If you plan a skeleton build with an NH70, NH71, or NH72, all four platforms work. For a solid-dial build with an NH35 or NH36, the same applies. The case does not restrict your movement choice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCrystal:\u003c\/strong\u003e Petrichor cases feature a domed sapphire for a vintage-inspired profile. Seikonaut and Royal Oak cases use flat sapphire crystals for a cleaner, more modern look.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBeginner recommendation:\u003c\/strong\u003e If this is your first build, the Royal Oak 37 mm V2 in Silver at $149 is the easiest starting point — it accepts the widest range of 28.5 mm dials and the slim profile looks good on almost any wrist. Read the \u003ca href=\"\/en-ca\/blogs\/seiko-mod-parts\/how-to-build-your-first-seiko-mod-a-step-by-step-guide\"\u003estep-by-step build guide\u003c\/a\u003e before you start.\u003c\/p\u003e\n\u003ch2\u003eQuick Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eStyle\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eThickness\u003c\/th\u003e\n\u003cth\u003eWR\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/en-ca\/collections\/nautilus-style-parts\"\u003eSeikonaut \/ Nautilus Ultra-Thin\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003ctd\u003e9.95 mm\u003c\/td\u003e\n\u003ctd\u003e50 m\u003c\/td\u003e\n\u003ctd\u003e$149\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/en-ca\/collections\/petrichor-style-parts\"\u003ePetrichor\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e37 mm\u003c\/td\u003e\n\u003ctd\u003eSlim (domed sapphire)\u003c\/td\u003e\n\u003ctd\u003e50 m\u003c\/td\u003e\n\u003ctd\u003e$195\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/en-ca\/collections\/royal-oak-style-parts\"\u003eRoyal Oak 41 mm\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e41 × 51 mm\u003c\/td\u003e\n\u003ctd\u003e12.2 mm\u003c\/td\u003e\n\u003ctd\u003e100 m\u003c\/td\u003e\n\u003ctd\u003e$110\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoyal Oak 37 mm V2\u003c\/td\u003e\n\u003ctd\u003e37 × 48 mm\u003c\/td\u003e\n\u003ctd\u003e9.95 mm\u003c\/td\u003e\n\u003ctd\u003e100 m\u003c\/td\u003e\n\u003ctd\u003e$149\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhich cases fit 28.5 mm dials and which fit 30.8 mm dials?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cdiv itemprop=\"text\"\u003e\u003cp\u003eThe Petrichor and Royal Oak 37 mm V2 take 28.5 mm dials. The Seikonaut \/ Nautilus Ultra-Thin and Royal Oak 41 mm take 30.8 mm dials. This is the single most important spec to check before ordering — the wrong dial size will not physically fit. See our \u003ca href=\"\/en-ca\/blogs\/seiko-mod-parts\/28-5mm-vs-30-8mm-seiko-dials-which-should-you-choose\"\u003edial size guide\u003c\/a\u003e for a full breakdown.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eDo I need to buy a crystal separately?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cdiv itemprop=\"text\"\u003e\u003cp\u003eNo. Every case ships with a sapphire crystal already installed. Petrichor cases include a domed sapphire; all other cases include a flat sapphire. You do not need to source or press a crystal yourself.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhich case is best for a first-time builder?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cdiv itemprop=\"text\"\u003e\u003cp\u003eThe Royal Oak 37 mm V2 is the most forgiving for beginners. It uses widely available 28.5 mm dials, supports every NH movement in the Nomods lineup, and the 37 mm size works on most wrists. Pair it with an NH35 and a solid dial for the simplest possible first build. Our \u003ca href=\"\/en-ca\/blogs\/seiko-mod-parts\/how-to-build-your-first-seiko-mod-a-step-by-step-guide\"\u003ebuild guide\u003c\/a\u003e walks through the full process step by step.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eCan I use a skeleton movement in any of these cases?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cdiv itemprop=\"text\"\u003e\u003cp\u003eYes. All four case platforms — Seikonaut, Petrichor, Royal Oak 41 mm, and Royal Oak 37 mm V2 — accept the NH70, NH71, and NH72 skeleton movements. Pair a skeleton movement with a matching skeleton dial in the correct size (28.5 mm or 30.8 mm) for your case. See our \u003ca href=\"\/en-ca\/blogs\/seiko-mod-parts\/nh72-skeleton-movement-guide\"\u003eNH72 skeleton guide\u003c\/a\u003e for build ideas.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eComplete Your Build\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/collections\/seiko-mod-dials\"\u003eSeiko Mod Dials\u003c\/a\u003e — skeleton and solid dials in 28.5 mm and 30.8 mm to match your case\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/collections\/seiko-mod-hands\"\u003eSeiko Mod Hands\u003c\/a\u003e — polished and brushed hand sets compatible with all NH movements\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/collections\/seiko-mod-movements\"\u003eSeiko Mod Movements\u003c\/a\u003e — NH35, NH36, NH72, and more for solid or skeleton builds\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/collections\/nautilus-style-parts\"\u003eNautilus-Style Parts\u003c\/a\u003e — dials, hands, and bracelets matched to the Seikonaut platform\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/collections\/royal-oak-style-parts\"\u003eRoyal Oak Parts\u003c\/a\u003e — dials, hands, and bracelets matched to Royal Oak cases\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNomods is an independent brand. Our products are original designs inspired by iconic watch aesthetics. We are not affiliated with or endorsed by any luxury watch manufacturer. All brand names are used for reference purposes only.\u003c\/em\u003e\u003c\/p\u003e","products":[{"product_id":"petrichor-37mm-case","title":"Petrichor 37mm Case","description":"\u003cp\u003eThe Silver Petrichor is a Nomods original — not a homage to any existing watch, but a design language we developed from scratch. Inspired by the flowing curves of 1960s and 1970s vintage watchmaking, the Petrichor case features soft, organic lines that set it apart from the angular profiles dominating the mod scene. Machined from 316L stainless steel with a brushed silver finish, fitted with a domed sapphire crystal, and sized at 37 mm for a refined wrist presence. Compatible with NH35 and NH36 movements, this case is ready for your next build.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e37 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBrushed silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eDomed sapphire (pre-installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMovement Compatibility\u003c\/td\u003e\n\u003ctd\u003eNH35, NH36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial Fit\u003c\/td\u003e\n\u003ctd\u003e28.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrown\u003c\/td\u003e\n\u003ctd\u003eScrew-down, included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracelet\u003c\/td\u003e\n\u003ctd\u003eIntegrated stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003eDepends on proper gasket installation during assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMovements:\u003c\/strong\u003e NH35 and NH36. The Petrichor is designed primarily for these two movements — unlike the Seikonaut case, which also accepts NH7x skeleton movements. If you plan to build a skeleton Petrichor, you will need the NH72 movement, which shares the same dimensions as the NH35.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDials:\u003c\/strong\u003e 28.5 mm. Compatible with Royal Oak style dials, waffle dials, and other 28.5 mm dials designed for NH35-based builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHands:\u003c\/strong\u003e Any NH-series compatible hands (hour 1.50 mm, minute 0.88 mm, seconds 0.20 mm).\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePetrichor case body (316L stainless steel, brushed silver finish)\u003c\/li\u003e\n\u003cli\u003eDomed sapphire crystal (pre-installed)\u003c\/li\u003e\n\u003cli\u003eCrown (screw-down)\u003c\/li\u003e\n\u003cli\u003eGaskets (pre-installed)\u003c\/li\u003e\n\u003cli\u003eIntegrated stainless steel bracelet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTools are not included. You will need a case opener, hand press, stem cutter, and movement holder for assembly.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eDesigned by Nomods\u003c\/h2\u003e\n\u003cp\u003eThe Petrichor is our own design. We did not set out to replicate an existing watch — we wanted to create something that felt like it could have come from the golden era of case design in the 1960s and 1970s, when curves were generous and cases hugged the wrist. The domed sapphire crystal is central to this vision: instead of a tall, flat crystal sitting above a deep rehaut, the dome follows the case contour, keeping the overall profile slim. Every case is individually checked for finishing quality — brushing consistency, edge sharpness, and crystal seating — before shipping.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat movements fit the Petrichor case?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eThe Petrichor is designed for the NH35 and NH36 movements. The NH72 skeleton movement also fits, as it shares the same external dimensions as the NH35. Other NH-series movements with the same footprint are compatible as well.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat dial size fits the Petrichor?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003e28.5 mm dials. This includes Royal Oak style dials, waffle dials, and other aftermarket 28.5 mm dials designed for NH35-based builds. Do not use 30.8 mm dials — they will not fit this 37 mm case.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eDoes the Petrichor fit NH72 or NH70 skeleton movements?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eThe NH72 fits because it shares the same case dimensions as the NH35. The NH70 also has the same footprint. However, the Petrichor was primarily designed and tested with the NH35 and NH36. For a skeleton build, the NH72 is the recommended choice.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eIs the Petrichor a Royal Oak homage?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eNo. The Petrichor is an original Nomods design. It does not replicate the Royal Oak, Nautilus, or any other existing watch. The design draws inspiration from the broad aesthetic movement of 1960s and 1970s vintage watchmaking — an era defined by flowing curves and integrated case designs — but the Petrichor’s specific lines, proportions, and details are entirely our own.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eComplete Your Build\u003c\/h2\u003e\n\u003cp\u003ePair the Silver Petrichor case with these compatible components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/nh35-movement\"\u003eNH35 Movement\u003c\/a\u003e — the recommended automatic movement for this case\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-v1-28-5mm-silver\"\u003eSilver Royal Oak 28.5mm Dial\u003c\/a\u003e — matches the brushed silver case finish\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/waffle-dial-28-5mm\"\u003eSilver-White Waffle Dial (28.5mm)\u003c\/a\u003e — textured dial with a light, clean look\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/royal-oak-hands-v2-silver\"\u003eSilver V2 Hands\u003c\/a\u003e — brushed silver hands to match the case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBrowse Collection\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/en-ca\/collections\/petrichor-style-parts\"\u003ePetrichor 37mm Seiko Mod Parts\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/seiko-mod-cases\"\u003eAll Seiko Mod Cases\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/petrichor-case\"\u003ePetrichor Watch Modding Case\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/seiko-mod-petrichor-37mm\"\u003eSeiko Mod Petrichor 37mm\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNomods is an independent brand. Our products are original designs inspired by iconic watch aesthetics. We are not affiliated with or endorsed by any luxury watch manufacturer. All brand names are used for reference purposes only.\u003c\/em\u003e\u003c\/p\u003e","brand":"Nomods","offers":[{"title":"Silver","offer_id":43323073527898,"sku":"PET-C-SIL","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold","offer_id":43323073560666,"sku":"PET-C-RSG","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Gold","offer_id":43323073593434,"sku":"PET-C-GLD","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD","offer_id":43323073626202,"sku":"PET-C-BLK","price":195.0,"currency_code":"USD","in_stock":true},{"title":"Gunmetal","offer_id":43323073658970,"sku":"PET-C-GUN","price":195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/2151\/4074\/files\/nomods-petrichor-seiko-mod-case-silver-1169983282.png?v=1748246890"},{"product_id":"royal-oak-37mm-v2-case","title":"Royal Oak 37mm V2 Case","description":"\u003cp\u003eThe V2 Ultrathin Silver Royal Oak case in brushed 316L stainless steel — at just 9.95 mm thick with a solid caseback, this is one of the thinnest Royal Oak-style cases available for Seiko modding. The angular octagonal bezel and integrated lugs capture the iconic sports-luxury silhouette at 37 mm diameter with 48 mm lug-to-lug reach. Sapphire crystal with your choice of blue or clear anti-reflective coating, screw-down crown, and 100 m water resistance. Compatible with NH35, NH36, NH38, NH70, NH71, and NH72 movements. Choose between a solid caseback at 9.95 mm or an exhibition caseback at 10.3 mm to display your movement.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e37 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLug-to-Lug\u003c\/td\u003e\n\u003ctd\u003e48 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e9.95 mm (solid) \/ 10.3 mm (exhibition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel, brushed silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 30.1984%;\"\u003eBracelet\u003c\/td\u003e\n\u003ctd style=\"width: 67.3412%;\"\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire (Blue AR or Clear AR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e100 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial Fit\u003c\/td\u003e\n\u003ctd\u003e28.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrown\u003c\/td\u003e\n\u003ctd\u003eScrew-down\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMovements:\u003c\/strong\u003e NH35, NH36, NH38, NH70, NH71, NH72. All Seiko NH-family movements with the standard 3 o’clock crown position fit this case directly. Not compatible with 7S26 or 7S36 movements due to different stem specifications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDials:\u003c\/strong\u003e 28.5 mm direct fit. Standard Seiko mod dials in this size drop in without modification.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCase body (brushed silver 316L stainless steel)\u003c\/li\u003e\n\u003cli\u003eBracelet\u003c\/li\u003e\n\u003cli\u003eSapphire crystal (pre-installed, optional Blue AR or Clear AR)\u003c\/li\u003e\n\u003cli\u003eCaseback (optional solid or exhibition)\u003c\/li\u003e\n\u003cli\u003eCrown\u003c\/li\u003e\n\u003cli\u003eCrystal gasket (pre-installed)\u003c\/li\u003e\n\u003cli\u003eCaseback gasket (pre-installed)\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eMovement, dial, hands, and tools are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy the V2 Ultrathin\u003c\/h2\u003e\n\u003cp\u003eThe V2 is the second generation of our Royal Oak 37mm case — redesigned from the ground up to reduce thickness without sacrificing water resistance. At 9.95 mm with a solid caseback, it is one of the slimmest Royal Oak-inspired Seiko mod cases on the market. Most competing cases in this style sit above 11 mm. The angular octagonal geometry follows the proportions of the original Royal Oak — brushed flat surfaces, polished rehaut, and integrated lugs that flow into the bracelet attachment — at a fraction of the price. The silver finish is the most versatile in the lineup: natural 316L steel requires no coating, making it the most scratch-tolerant option available.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv itemscope=\"\" itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003cdiv itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat movements fit this case?\u003c\/h3\u003e\n\u003cdiv itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eThe Royal Oak 37mm V2 case accepts Seiko NH35, NH36, NH38, NH70, NH71, and NH72 movements. All share the same case fitment and crown position. The 7S26 and 7S36 movements are not compatible due to a different stem specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat is the difference between solid and exhibition caseback?\u003c\/h3\u003e\n\u003cdiv itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eThe solid caseback gives the case its thinnest profile at 9.95 mm and provides a clean, sealed back. The exhibition caseback has a sapphire window that lets you see the movement inside, but adds 0.35 mm for a total thickness of 10.3 mm. Both maintain 100 m water resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope=\"\" itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat dial size fits this case?\u003c\/h3\u003e\n\u003cdiv itemscope=\"\" itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003e28.5 mm dials fit directly. This is the standard Seiko mod dial size used across Royal Oak 37mm, Nautilus, and other 37 mm platforms. Check our \u003ca href=\"\/en-ca\/collections\/royal-oak-style-parts\"\u003eRoyal Oak parts collection\u003c\/a\u003e for compatible dials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eComplete Your Build\u003c\/h2\u003e\n\u003cp\u003ePair the silver case with matching components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDials:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-v1-28-5mm\"\u003eSilver dial\u003c\/a\u003e · \u003ca href=\"\/en-ca\/products\/waffle-dial-28-5mm\"\u003eSilver waffle dial\u003c\/a\u003e · \u003ca href=\"\/en-ca\/products\/waffle-dial-28-5mm\"\u003eBlue waffle dial\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkeleton dials:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-v2-28-5mm\"\u003eSilver skeleton V2\u003c\/a\u003e · \u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-v2-28-5mm\"\u003eGold skeleton V2\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHands:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/royal-oak-hands-v2\"\u003eSilver V2 hands\u003c\/a\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eMovements:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/nh35-movement\"\u003eNH35\u003c\/a\u003e · \u003ca href=\"\/en-ca\/products\/nh72-skeleton-movement\"\u003eNH72\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse all \u003ca href=\"\/en-ca\/collections\/royal-oak-37mm-case\"\u003eRoyal Oak 37mm cases\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/recommended-with-37mm-royal-oak-seiko-modding-case\"\u003eRecommended with 37mm Royal Oak\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/royal-oak-style-parts\"\u003eRoyal Oak parts\u003c\/a\u003e · \u003ca href=\"\/en-ca\/collections\/seiko-mod-cases\"\u003eAll cases\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNomods is an independent brand. Our products are original designs inspired by iconic watch aesthetics. We are not affiliated with or endorsed by any luxury watch manufacturer. All brand names are used for reference purposes only.\u003c\/em\u003e\u003c\/p\u003e","brand":"Nomods","offers":[{"title":"Silver \/ Blue AR \/ Solid","offer_id":43323073921114,"sku":"RO37-C-V2-SIL-SC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Blue AR \/ Exhibition","offer_id":43323073953882,"sku":"RO37-C-V2-SIL-EC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Clear AR \/ Solid","offer_id":43323073986650,"sku":"RO37-C-V2-SIL-SC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Clear AR \/ Exhibition","offer_id":43323074019418,"sku":"RO37-C-V2-SIL-EC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Blue AR \/ Solid","offer_id":43323074052186,"sku":"RO37-C-V2-RSG-SC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Blue AR \/ Exhibition","offer_id":43323074084954,"sku":"RO37-C-V2-RSG-EC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Clear AR \/ Solid","offer_id":43323074117722,"sku":"RO37-C-V2-RSG-SC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Clear AR \/ Exhibition","offer_id":43323074150490,"sku":"RO37-C-V2-RSG-EC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gunmetal \/ Blue AR \/ Solid","offer_id":43323074183258,"sku":"RO37-C-V2-GUN-SC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gunmetal \/ Blue AR \/ Exhibition","offer_id":43323074216026,"sku":"RO37-C-V2-GUN-EC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gunmetal \/ Clear AR \/ Solid","offer_id":43323074248794,"sku":"RO37-C-V2-GUN-SC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gunmetal \/ Clear AR \/ Exhibition","offer_id":43323074281562,"sku":"RO37-C-V2-GUN-EC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Blue AR \/ Solid","offer_id":43323074314330,"sku":"RO37-C-V2-GLD-SC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Blue AR \/ Exhibition","offer_id":43323074347098,"sku":"RO37-C-V2-GLD-EC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Clear AR \/ Solid","offer_id":43323074379866,"sku":"RO37-C-V2-GLD-SC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Clear AR \/ Exhibition","offer_id":43323074412634,"sku":"RO37-C-V2-GLD-EC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Blue AR \/ Solid","offer_id":43323074445402,"sku":"RO37-C-V2-BLK-SC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Blue AR \/ Exhibition","offer_id":43323074478170,"sku":"RO37-C-V2-BLK-EC-BA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Clear AR \/ Solid","offer_id":43323074510938,"sku":"RO37-C-V2-BLK-SC-CA","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Clear AR \/ Exhibition","offer_id":43323074543706,"sku":"RO37-C-V2-BLK-EC-CA","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/2151\/4074\/files\/nomods-blue-ar-exhibition-v2-ultrathin-silver-royal-oak-seiko-mod-case-37mm-nh35-nh72-1217137825.jpg?v=1768664409"},{"product_id":"royal-oak-41mm-case","title":"Royal Oak 41mm Case","description":"\u003cp\u003eThe Silver Royal Oak 41mm is the largest integrated-design case in the Nomods lineup — bold wrist presence without the price tag of a full build. CNC-machined from 316L stainless steel with an octagonal bezel, polished rehaut, and brushed mid-case, this case captures the finishing language of luxury integrated-bracelet sports watches. The 41 mm diameter sits confidently on wrists 17 cm and above. Sapphire crystal in your choice of Blue AR, Clear AR, or No AR coating, screw-down crown, and 100 m water resistance when assembled correctly. Compatible with NH35, NH38, NH70, NH71, and NH72 movements. Includes a spacer ring for 30.8 mm dials.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e41 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLug-to-Lug\u003c\/td\u003e\n\u003ctd\u003e51 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e12.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBrushed mid-case, polished rehaut and bezel bevels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire (Blue AR \/ Clear AR \/ No AR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e100 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial Fit\u003c\/td\u003e\n\u003ctd\u003e30.8–31.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLug Width\u003c\/td\u003e\n\u003ctd\u003e22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrown\u003c\/td\u003e\n\u003ctd\u003eScrew-down, included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMovements:\u003c\/strong\u003e NH35, NH38, NH70, NH71, NH72 — all drop in without modification. This covers standard three-hand, skeleton, and GMT configurations from the Seiko NH family.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDials:\u003c\/strong\u003e 30.8 mm dials fit with the included spacer ring. 31.8 mm dials fit directly without the spacer. Most Royal Oak style dials in the Nomods catalog are 30.8 mm and designed for this case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHands:\u003c\/strong\u003e We recommend a longer handset for the 41 mm dial opening — standard-length hands designed for smaller cases may look undersized. Check the \u003ca href=\"\/en-ca\/collections\/recommended-with-royal-oak-case-41mm\"\u003erecommended parts for this case\u003c\/a\u003e for tested hand options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStraps:\u003c\/strong\u003e 22 mm lug width. Compatible with \u003ca href=\"\/en-ca\/products\/royal-oak-41mm-rubberstrap\"\u003eRoyal Oak 41mm rubber straps\u003c\/a\u003e and any standard 22 mm strap or NATO.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStainless steel bracelet\u003c\/li\u003e\n\u003cli\u003eCase body (316L stainless steel, brushed silver finish)\u003c\/li\u003e\n\u003cli\u003eSapphire crystal (pre-installed, variant-dependent AR coating)\u003c\/li\u003e\n\u003cli\u003eSpacer ring (for 30.8 mm dials)\u003c\/li\u003e\n\u003cli\u003eScrew-down crown\u003c\/li\u003e\n\u003cli\u003eCaseback gasket and crystal gasket\u003c\/li\u003e\n\u003cli\u003eSpring bars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eMovement, dial, hands, strap, and tools are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eWhy We Chose This Case\u003c\/h2\u003e\n\u003cp\u003eThe Royal Oak 41mm is the most popular integrated-style case in the Seiko modding community for good reason. The octagonal bezel geometry is sharp and precise, with alternating brushed and polished surfaces that create real depth under changing light. The polished rehaut adds a ring of brightness between the dial and bezel that most aftermarket cases at this price skip entirely. We tested dimensional accuracy across production batches and confirmed that crown alignment, crystal seating, and gasket fit are consistent. This is an affordable entry into a 41 mm Royal Oak build with sapphire crystal and 100 m water resistance.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat movements fit the Royal Oak 41mm case?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eThe NH35, NH38, NH70, NH71, and NH72 all fit without modification. These cover standard automatic, skeleton, and open-heart configurations. The case is designed around the Seiko NH movement family dimensions.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat dial size fits this case?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003e30.8 mm dials fit with the included spacer ring. 31.8 mm dials fit directly without the spacer. Most Nomods Royal Oak dials are 30.8 mm and are designed to pair with this case.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eIs this case waterproof?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eThe case is rated to 100 m water resistance when assembled correctly with all gaskets properly seated and the screw-down crown fully engaged. If you plan to submerge the watch, we recommend having a watchmaker pressure-test the completed build.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat handset should I use with the 41mm case?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp itemprop=\"text\"\u003eWe recommend longer hands designed for larger dials. Standard-length hands built for 28.5 mm dials will look undersized against the 41 mm dial opening. The \u003ca href=\"\/en-ca\/products\/royal-oak-hands-v1\"\u003eRoyal Oak hands\u003c\/a\u003e in the Nomods catalog are sized for this case.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eComplete Your Build\u003c\/h2\u003e\n\u003cp\u003ePair this silver case with matching silver-tone components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDials:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-30-8mm\"\u003e30.8 mm Skeleton Dial (Silver Index)\u003c\/a\u003e — \u003ca href=\"\/en-ca\/products\/royal-oak-skeleton-dial-30-8mm\"\u003e30.8 mm Skeleton Dial (Gold Index)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHands:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/royal-oak-hands-v1\"\u003eRoyal Oak Silver Hands\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBracelet:\u003c\/strong\u003e Stainless steel bracelet (included with case). Optional rubber strap swap: \u003ca href=\"\/en-ca\/products\/royal-oak-41mm-rubberstrap\"\u003eBlack Rubber Strap\u003c\/a\u003e — \u003ca href=\"\/en-ca\/products\/royal-oak-41mm-rubberstrap\"\u003eBlue Rubber Strap\u003c\/a\u003e.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovements:\u003c\/strong\u003e \u003ca href=\"\/en-ca\/products\/nh35-movement\"\u003eNH35\u003c\/a\u003e — \u003ca href=\"\/en-ca\/products\/nh70-skeleton-movement\"\u003eNH70\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBrowse the full \u003ca href=\"\/en-ca\/collections\/royal-oak-watch-modding-case-41mm\"\u003eRoyal Oak 41mm Case collection\u003c\/a\u003e — \u003ca href=\"\/en-ca\/collections\/recommended-with-royal-oak-case-41mm\"\u003eRecommended parts for this case\u003c\/a\u003e — \u003ca href=\"\/en-ca\/collections\/41-mm-builds-parts\"\u003e41mm Seiko Mod Parts\u003c\/a\u003e — \u003ca href=\"\/en-ca\/collections\/seiko-mod-cases\"\u003eAll Seiko Mod Cases\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNomods is an independent brand. Our products are original designs inspired by iconic watch aesthetics. We are not affiliated with or endorsed by any luxury watch manufacturer. All brand names are used for reference purposes only.\u003c\/em\u003e\u003c\/p\u003e","brand":"Nomods","offers":[{"title":"Silver \/ Blue AR","offer_id":43323075002458,"sku":"RO41-C-SIL-BA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ Clear AR","offer_id":43323075035226,"sku":"RO41-C-SIL-CA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ No AR","offer_id":43323075067994,"sku":"RO41-C-SIL-NA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Blue AR","offer_id":43323075100762,"sku":"RO41-C-RSG-BA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ Clear AR","offer_id":43323075133530,"sku":"RO41-C-RSG-CA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Rose Gold \/ No AR","offer_id":43323075166298,"sku":"RO41-C-RSG-NA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Blue AR","offer_id":43323075199066,"sku":"RO41-C-GLD-BA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Clear AR","offer_id":43323075231834,"sku":"RO41-C-GLD-CA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ No AR","offer_id":43323075264602,"sku":"RO41-C-GLD-NA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Blue AR","offer_id":43323075297370,"sku":"RO41-C-BLK-BA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ Clear AR","offer_id":43323075330138,"sku":"RO41-C-BLK-CA","price":110.0,"currency_code":"USD","in_stock":true},{"title":"Black PVD \/ No AR","offer_id":43323075362906,"sku":"RO41-C-BLK-NA","price":110.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/2151\/4074\/files\/nomods-royal-oak-37mm-seiko-mod-case-silver-1169983321.webp?v=1768656649"},{"product_id":"seikonaut-40mm-case","title":"Seikonaut 40mm Case — Ultra-Thin Nautilus-Style Seiko Mod Case","description":"\u003cp\u003eThe Seikonaut 40mm is one of the thinnest Nautilus-style Seiko mod cases available — just 9.95 mm at the solid caseback. CNC-machined from 316L stainless steel with brushed and polished surface finishing, this 40 mm case features an integrated-lug silhouette inspired by the iconic Nautilus shape, available in six finishes (Silver, Black, Gold, Rose Gold, Two-Tone Gold, Gunmetal). The included sapphire crystal comes with your choice of clear or blue AR coating, and the screw-down crown delivers 50 m water resistance. Compatible with NH35, NH36, NH38, NH70, NH71, and NH72 movements using 30.8 mm dials — read on for full specs, compatibility details, and finish guidance.\u003c\/p\u003e\n\u003ch2\u003eAvailable in 6 finishes\u003c\/h2\u003e\n\u003cp\u003eJump to: \u003ca href=\"#silver\"\u003eSilver\u003c\/a\u003e · \u003ca href=\"#black\"\u003eBlack\u003c\/a\u003e · \u003ca href=\"#gold\"\u003eGold\u003c\/a\u003e · \u003ca href=\"#rose-gold\"\u003eRose Gold\u003c\/a\u003e · \u003ca href=\"#two-tone-gold\"\u003eTwo-Tone Gold\u003c\/a\u003e · \u003ca href=\"#gunmetal\"\u003eGunmetal\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3 id=\"silver\"\u003eSilver — brushed stainless with polished accents\u003c\/h3\u003e\n\u003cp\u003eThe cleanest, most versatile finish. Brushed 316L surfaces with polished bevel transitions catch light without showing wear. The all-purpose choice that pairs with any dial and any strap.\u003c\/p\u003e\n\n\u003ch3 id=\"black\"\u003eBlack — full PVD-coated stealth finish\u003c\/h3\u003e\n\u003cp\u003eA full physical-vapor-deposition coating across the case body, bracelet, and caseback. The matte tonality reads dressy-stealth in daylight and disappears entirely in low light. Pairs strongly with skeleton dials and dark-toned hands.\u003c\/p\u003e\n\n\u003ch3 id=\"gold\"\u003eGold — warm yellow champagne tone\u003c\/h3\u003e\n\u003cp\u003eYellow-gold PVD with a champagne warmth in the brushed surfaces. The dressiest of the warm-tone finishes; pairs traditionally with cream or champagne dials and brown leather, more boldly with deep blue or black-skeleton dials.\u003c\/p\u003e\n\n\u003ch3 id=\"rose-gold\"\u003eRose Gold — soft pink-gold dress tone\u003c\/h3\u003e\n\u003cp\u003ePink-gold PVD applied at lower colour-saturation than the yellow variant — reads warm and understated, the dressiest of the six finishes. Pairs especially well with white, ivory, or chocolate dials.\u003c\/p\u003e\n\n\u003ch3 id=\"two-tone-gold\"\u003eTwo-Tone Gold — brushed steel with polished gold accents\u003c\/h3\u003e\n\u003cp\u003eA duo finish — brushed silver case body with polished gold bezel, crown, and centre bracelet links. Bridges the silver and gold options for builds that don't commit to one tone. Often called a champagne or bi-colour configuration.\u003c\/p\u003e\n\n\u003ch3 id=\"gunmetal\"\u003eGunmetal — deep cool-grey with smoky finish\u003c\/h3\u003e\n\u003cp\u003eA cooler tonal cousin of black PVD — deeper than steel, lighter than full black, with a faint warm-grey undertone. The most unusual finish; pairs distinctively with brushed-steel dials or earth-toned leather.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e40 mm (10H–4H) — 38 mm (12H–6H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e9.95 mm (solid caseback) \/ 10.3 mm (exhibition caseback)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e316L Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBrushed with polished accents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrystal\u003c\/td\u003e\n\u003ctd\u003eSapphire (clear or blue AR coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003e50 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDial Fit\u003c\/td\u003e\n\u003ctd\u003e30.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCrown\u003c\/td\u003e\n\u003ctd\u003eScrew-down, included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMovements:\u003c\/strong\u003e NH35, NH36, NH38, NH70, NH71, NH72 — all standard Seiko NH-family automatics fit without modification. The crown stem must be cut to length during installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDials:\u003c\/strong\u003e 30.8 mm dials only. This case does not accept 28.5 mm dials without a spacer ring. Pair it with our \u003ca href=\"\/en-ca\/products\/nautilus-skeleton-dial-30-8mm\"\u003eNautilus Skeleton Dial 30.8mm\u003c\/a\u003e for a skeleton build, or any other 30.8 mm dial designed for the NH35-family.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBracelet:\u003c\/strong\u003e Stainless steel Seikonaut integrated bracelet included with the case. Standard spring bar attachment at the lugs, so you can swap to a rubber or leather strap if you prefer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot compatible:\u003c\/strong\u003e 7S26 and 7S36 movements use a different stem height and are not recommended for this case.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeikonaut 40mm case body in your selected finish (316L stainless steel)\u003c\/li\u003e\n\u003cli\u003eSapphire crystal in your selected AR coating (clear or blue)\u003c\/li\u003e\n\u003cli\u003eCaseback in your selected configuration (solid or exhibition)\u003c\/li\u003e\n\u003cli\u003eScrew-down crown\u003c\/li\u003e\n\u003cli\u003eStainless steel Seikonaut integrated bracelet\u003c\/li\u003e\n\u003cli\u003eGaskets (pre-installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTools are not included. You will need a case opener, hand press, stem cutter, and movement holder for assembly.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eDesigned by Nomods\u003c\/h2\u003e\n\u003cp\u003eThe Seikonaut is our take on the ultra-thin Nautilus-style case for Seiko mods. The 9.95 mm solid-caseback profile is the thinnest configuration we make, designed for builders who want the Nautilus integrated-lug silhouette in a dress-watch profile. The exhibition caseback adds 0.35 mm for skeleton builds where you want the movement visible. Every case is individually checked for brushing consistency, edge sharpness, and crystal seating before shipping.\u003c\/p\u003e\n\u003ch2\u003eComplete Your Build\u003c\/h2\u003e\n\u003cp\u003ePair the Seikonaut 40mm case with these compatible components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/nh35-movement\"\u003eNH35 Movement\u003c\/a\u003e — the standard automatic movement for this case\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/nh72-skeleton-movement\"\u003eNH72 Skeleton Movement\u003c\/a\u003e — for skeleton builds with the exhibition caseback\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-ca\/products\/royal-oak-hands-v2-silver\"\u003eSilver V2 Hands\u003c\/a\u003e — Nautilus-compatible hands in brushed silver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBrowse Collection\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/en-ca\/collections\/nautilus-style-parts\"\u003eNautilus Style Mod Parts\u003c\/a\u003e — \u003ca href=\"\/en-ca\/collections\/seiko-mod-cases\"\u003eAll Seiko Mod Cases\u003c\/a\u003e — \u003ca href=\"\/en-ca\/collections\/seiko-nautilus\"\u003eAll Seiko Nautilus Mods\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNomods is an independent brand specializing in Seiko-compatible watch modifications. We are not affiliated with, endorsed by, or connected to Seiko, Rolex, Audemars Piguet, Patek Philippe, or any other watch brand mentioned on this site. All brand names and trademarks are the property of their respective owners and are used solely for descriptive and comparative purposes.\u003c\/em\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"@id\": \"https:\/\/nomods.co\/products\/seikonaut-40mm-case#product\",\n  \"name\": \"Seikonaut 40mm Case — Ultra-Thin Nautilus-Style Seiko Mod Case\",\n  \"description\": \"Ultra-thin 9.95mm Nautilus-style Seiko mod case in six finishes (Silver, Black, Gold, Rose Gold, Two-Tone Gold, Gunmetal). CNC-machined 316L stainless steel, sapphire crystal with clear or blue AR coating, screw-down crown, 50m water resistance. 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