Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115
Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115
Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115
Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115
Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115
Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115

Watchmaking kit - GMT Bronze Diver (CuSn8) - Ref. 23115

Sale price£379.00

UK tax included. International orders are sold excl. VAT. Please see shipping & tax information below.

Kit:Watchmaking starter kit

Automatic watch movement

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Full watchmaker tool kit

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The Bronze Diver is our first kit with a bronze case made of a strengthened copper alloy with 8% tin, commonly known as CuSn8. Over time the case will change its colour and develop a beautiful and unique patina. The case is completed by a a unidirectional 120-click bezel with a matte insert, scratch resistant sapphire crystal with date cyclops and a screw down crown to ensure the water resistance of your watch.

The kit features a matte black dial with a polished, gold coloured hour markers (lume filled) and matching  lume filled diver hands matching the warm hue of the bronze case. Underneath the dial, the reliable NH-34A GMT automatic watch movement will ensure precise time keeping of your watch across two timezones!

BRONZE CASES - Please read before ordering

As this is a solid bronze case, please note that when the case arrives it will be of a rose golden colour and develop a patina over time. Solid bronze can cause a skin reaction, if it is in contact over a long period of time. Using a stainless steel case back (as we do in our kit), greatly reduces the contact to your skin, but if you notice any issues, please stop wearing your watch for a while.

History in the Making

The Bronze Diver

With a case carved out of solid CuSn8, this watch will noticeably age over time while on your wrist. Copper Bronze alloys have been used for a large part of history as they might develop a patina over time (all the way to a slight green hue), they remain resistant to corrosion and hence are well suited for exposure to salty sea water.

Your Kit components

Luminous Diver Dial

Classic matte black diver dial with gold polished hourmarkers and hands to match the bronze colour of your case. Both (hourmarker and hands) are luminous for better visibility.

CuSn8 CAse

With its warm hue, the bronze case is the most important feature of this kit. Aging over time and developing its patina, the case sits comfortably on your wrist with 41mm size.


Automatic Japanese watch movement with 24 jewel bearings, 41 hours power reserve, and calendar complication.

FKM or Italian leather

Pair the Bronze Diver with a fully water resistant FKM strap or a soft Italian Leather strap (20mm) - both with quick release spring bars and bronze buckle.


Our full watchmaking Starter kits

Designed for you, our kits contain everything you need to build any of
our automatic watches at home. Together with the full tool kit and
detailed step by step instructions, you will receive all of the kit
components above.

Free & Fast delivery

Shipping Policy

Our kits are shipped from our London workshop with Royal Mail and we aim to send them within 1-2 business days.

International orders are shipped via UPS or a similar courier. Orders are shipped excl. UK tax (deducted at check-out). Please note that customers will remain liable for local taxes and/or import duty for deliveries outside the UK.

For more information, please follow the link below to view our shipping policy.