AP x Swatch: Royal Pop conversion case

Name: AP x Swatch: Royal Pop conversion case
Brand: Nomods
SKU: POP-C-SIL
Price: 250.0 USD
Availability: InStock
Rating: 4.56 (9 reviews)

Nomods Rose gold AP x Swatch: Royal Pop conversion case

Nomods Gold AP x Swatch: Royal Pop conversion case

Nomods Black PVD AP x Swatch: Royal Pop conversion case

Transform your Royal Pop into a full stainless-steel wristwatch.

39mm case
50mm lug-to-lug
9mm thick
Sapphire crystal
10 ATM
Sistem51 only

$250.00

Color — Silver

6 Months Warranty
Worldwide Shipping
30 Day Guarantee

Complete Your Build

DIY kit for your Royal Pop

Wish to send it in to us instead? Send us an email!

Next batch ready 30th of November (estimated)

Transform your Royal Pop into a full stainless-steel wristwatch. This conversion case rehouses your Swatch Sistem51 movement in a 39 mm, Oak steel case with a sapphire crystal — the watch you already own keeps ticking, but on the wrist it reads as a proper integrated-sports watch instead of plastic.

What it is

The Royal Pop conversion case is an aftermarket stainless-steel case built to take a Swatch Sistem51 movement. You transplant your own Sistem51 into it, and the result is a slim 39 mm watch — octagonal integrated-sports bezel, sapphire crystal, 10 ATM water resistance — with a level of finishing the original plastic case can't come close to.

Specifications

Case size	39 mm
Lug-to-lug	50 mm
Thickness	9 mm
Crystal	Sapphire
Water resistance	10 ATM (100 m)
Compatibility	Swatch Sistem51 only
Finishes	Silver, Gold, Rose Gold, Black PVD

Frequently asked questions

Which watch does the Royal Pop conversion case fit?

It's built for the Swatch Sistem51 movement only. You move your Sistem51 out of its original case and into this one.

Does it come with a strap or bracelet?

The conversion case is sold with the bracelet included. Additional rubber straps can be purchased!

Is it water resistant?

Yes — rated 10 ATM (100 m) with the sapphire crystal and proper gaskets, so it handles rain and hand-washing. It is not a dive watch.

Which finishes are available?

Four: Silver, Gold, Rose Gold and Black PVD. Pick your finish at the top of the page.

Can you build it for me?

Want it built for you? See finished Royal Pop builds at Swatchmods.

[{"id":43856689070170,"title":"Silver","option1":"Silver","option2":null,"option3":null,"sku":"POP-C-SIL","requires_shipping":true,"taxable":true,"featured_image":{"id":41604558258266,"product_id":8071014121562,"position":1,"created_at":"2026-08-17T12:46:20+02:00","updated_at":"2026-08-17T15:22:39+02:00","alt":"Nomods Silver AP x Swatch: Royal Pop conversion case","width":1122,"height":1402,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-silver-ap-x-swatch-royal-pop-conversion-case-1254472982.jpg?v=1786972959","variant_ids":[43856689070170]},"available":true,"name":"AP x Swatch: Royal Pop conversion case - Silver","public_title":"Silver","options":["Silver"],"price":25000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Nomods Silver AP x Swatch: Royal Pop conversion case","id":30547782795354,"position":1,"preview_image":{"aspect_ratio":0.8,"height":1402,"width":1122,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-silver-ap-x-swatch-royal-pop-conversion-case-1254472982.jpg?v=1786972959"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":43856689102938,"title":"Rose gold","option1":"Rose gold","option2":null,"option3":null,"sku":"POP-C-RSG","requires_shipping":true,"taxable":true,"featured_image":{"id":41604554358874,"product_id":8071014121562,"position":2,"created_at":"2026-08-17T12:46:07+02:00","updated_at":"2026-08-17T15:22:11+02:00","alt":"Nomods Rose gold AP x Swatch: Royal Pop conversion case","width":832,"height":1248,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-rose-gold-ap-x-swatch-royal-pop-conversion-case-1254472981.jpg?v=1786972931","variant_ids":[43856689102938]},"available":true,"name":"AP x Swatch: Royal Pop conversion case - Rose gold","public_title":"Rose gold","options":["Rose gold"],"price":26500,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Nomods Rose gold AP x Swatch: Royal Pop conversion case","id":30547782533210,"position":2,"preview_image":{"aspect_ratio":0.667,"height":1248,"width":832,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-rose-gold-ap-x-swatch-royal-pop-conversion-case-1254472981.jpg?v=1786972931"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":43856689135706,"title":"Gold","option1":"Gold","option2":null,"option3":null,"sku":"POP-C-GLD","requires_shipping":true,"taxable":true,"featured_image":{"id":41604554555482,"product_id":8071014121562,"position":3,"created_at":"2026-08-17T12:46:08+02:00","updated_at":"2026-08-17T15:21:37+02:00","alt":"Nomods Gold AP x Swatch: Royal Pop conversion case","width":832,"height":1248,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-gold-ap-x-swatch-royal-pop-conversion-case-1254472980.jpg?v=1786972897","variant_ids":[43856689135706]},"available":true,"name":"AP x Swatch: Royal Pop conversion case - Gold","public_title":"Gold","options":["Gold"],"price":26500,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Nomods Gold AP x Swatch: Royal Pop conversion case","id":30547782565978,"position":3,"preview_image":{"aspect_ratio":0.667,"height":1248,"width":832,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-gold-ap-x-swatch-royal-pop-conversion-case-1254472980.jpg?v=1786972897"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":43856689168474,"title":"Black PVD","option1":"Black PVD","option2":null,"option3":null,"sku":"POP-C-BLK","requires_shipping":true,"taxable":true,"featured_image":{"id":41604554948698,"product_id":8071014121562,"position":4,"created_at":"2026-08-17T12:46:09+02:00","updated_at":"2026-08-17T15:21:11+02:00","alt":"Nomods Black PVD AP x Swatch: Royal Pop conversion case","width":832,"height":1248,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-black-pvd-ap-x-swatch-royal-pop-conversion-case-1254472979.jpg?v=1786972871","variant_ids":[43856689168474]},"available":true,"name":"AP x Swatch: Royal Pop conversion case - Black PVD","public_title":"Black PVD","options":["Black PVD"],"price":26500,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Nomods Black PVD AP x Swatch: Royal Pop conversion case","id":30547782598746,"position":4,"preview_image":{"aspect_ratio":0.667,"height":1248,"width":832,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-black-pvd-ap-x-swatch-royal-pop-conversion-case-1254472979.jpg?v=1786972871"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":43856689070170,"title":"Silver","option1":"Silver","option2":null,"option3":null,"sku":"POP-C-SIL","requires_shipping":true,"taxable":true,"featured_image":{"id":41604558258266,"product_id":8071014121562,"position":1,"created_at":"2026-08-17T12:46:20+02:00","updated_at":"2026-08-17T15:22:39+02:00","alt":"Nomods Silver AP x Swatch: Royal Pop conversion case","width":1122,"height":1402,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-silver-ap-x-swatch-royal-pop-conversion-case-1254472982.jpg?v=1786972959","variant_ids":[43856689070170]},"available":true,"name":"AP x Swatch: Royal Pop conversion case - Silver","public_title":"Silver","options":["Silver"],"price":25000,"weight":0,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"featured_media":{"alt":"Nomods Silver AP x Swatch: Royal Pop conversion case","id":30547782795354,"position":1,"preview_image":{"aspect_ratio":0.8,"height":1402,"width":1122,"src":"\/\/nomods.co\/cdn\/shop\/files\/nomods-silver-ap-x-swatch-royal-pop-conversion-case-1254472982.jpg?v=1786972959"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

AP x Swatch: Royal Pop conversion case

$250.00

Fixing the Royal Pop by converting it into a real wristwatch

Nomods vs Others

	NOMODS	Others
Premium 316L Stainless Steel
Sapphire Crystal Glass
Precision Machined Components
30-Day Money Back Guarantee
Free Shipping Over $100
Quality Control Testing
Community Support
6-month parts / 2-year build warranty

Choose quality and precision. Choose Nomods.

Latest from Our Blog

Seiko Mod Gift Guide: Watches & Kits by Budget

In This Guide Under $40 — for the modder who tinkers $110–$195 — start a build (cases & movements) $250 — the showpiece: turn a...

Oct 08, 2026

Patek Nautilus Alternatives: Affordable Options From a $99 Homage to a Seiko Mod (2026)

The Patek Philippe Nautilus is the watch that launched a thousand waitlists. Gérald Genta sketched its porthole-shaped case in 1976, and the horizontally embossed dial,...

Jul 02, 2026

Royal Oak Alternatives: From $99 Homages to a Wearable Seiko Mod (2026)

The Audemars Piguet Royal Oak is one of the most recognizable watch designs ever made — the octagonal bezel with exposed screws, the "Grande Tapisserie"...

Jul 02, 2026

MoonSwatch Modding vs Seiko Modding: What You Can Customize

Swatch just dropped an Audemars Piguet collaboration — the bioceramic "Royal Pop," a roughly $400 pocket-watch riff on the Royal Oak — and watch forums...

May 16, 2026

Seiko Black Bay Mod: The Tudor Vintage Diver Guide

Tudor Black Bay is what Rolex looks like when it stops trying to be expensive. The Heritage line takes 1950s-and-1960s Tudor military divers — snowflake...

May 10, 2026

Seiko Tank Mod: The Cartier Rectangular Alternative

A Seiko Tank mod is a Seiko-movement watch dressed in a rectangular Cartier-Tank-styled case, dialed and handed to evoke the most iconic dress watch of...

May 10, 2026

Seiko Aquanaut Mod: The Patek Sport Alternative Guide

A Patek Philippe Aquanaut on the wrist runs $20,000 to $35,000. A Seiko-platform Aquanaut mod — the same rounded cushion case, the same rubber strap,...

May 10, 2026

Seiko Santos Mod: The Cartier Alternative Guide (2026)

In This Article What Is a Seiko Santos Mod? The Cartier Santos Design DNA Seiko Santos Mod vs Real Cartier Santos Key Parts for a...

Apr 07, 2026

Seiko Datejust Mod: The Complete Guide (2026)

Table of Contents What Is a Seiko Datejust Mod? Why the Datejust Is the Most Modded Rolex Style Seiko Datejust Mod vs Real Rolex Datejust...

Apr 07, 2026

Buying a Seiko Mod Watch: Complete Buyer's Guide [2026]

Table of Contents Why buy a Seiko mod watch? How to choose your Seiko Mod Our best pre-assembled Seiko Mods Build or buy? Comparison Shipping...

Apr 01, 2026

Seiko Mod: The Complete Guide to Custom Seiko Watches [2026]

Table of Contents What Is a Seiko Mod? Why Seiko Is the Go-To Brand for Modding Most Popular Mod Styles Essential Parts for a Seiko...

Apr 01, 2026

Seiko Nautilus Mods: The Complete Cost & Build Guide (2026)

Table of Contents What Is a Seiko Nautilus Mod? What Does a Nautilus Mod Actually Cost? What Makes a Quality Nautilus Mod Nautilus vs Royal...

Feb 03, 2026

5 stars: 8 (89%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 1 (11%)

Exceeded my expectations!

Excellent quality, amazing finish, and it wears just perfect!

Sublime

Boîtier très bien fini

Perfect !

It looks so good and high quality.

100 % RELIABLE

First of all, I want to start by saying thank you. I met people who—beyond just business and money—are truly decent human beings; they treated me like family with courtesy and respect. It was a great pleasure doing business with this lovely family. My name is Carlos Mejia (786-366-1443) if anyone wants to hear more about the high quality and excellent service. Many thanks, especially to Mat and his entire team—God bless you always. From the bottom of my heart, thank you.

Well made and precisely engineered

Well made and precisely engineered !

Very good and very slim but the only problem that I hase is whit the stem.

Only need an instructions set … without it is very difficult to use it

Also available a perfect video instruction set! An answer to every question. Simply perfect.

Just avoid

I Followed the videos on instagram but no proper instructions and communication is terrible doesn’t respond to emails or dms. Spend your money elsewhere.

Amazing

Amazing piece. I’m very happy with the watch and the delivery service. Thank you very much indeed.

Frequently bought together

Collections

Collections

AP x Swatch: Royal Pop conversion case

Complete Your Build

DIY kit for your Royal Pop

What it is

Specifications

Frequently asked questions

DIY kit for your Royal Pop

What it is

Specifications

Frequently asked questions

DIY kit for your Royal Pop

What it is

Specifications

Frequently asked questions

DIY kit for your Royal Pop

What it is

Specifications

Frequently asked questions

DIY kit for your Royal Pop

Fixing the Royal Pop by converting it into a real wristwatch

What Our Customers Say

Nomods vs Others

You may also like

Latest from Our Blog

Customer Reviews