In production

CB X ACE "MilSpec Amsterdam" GMT Limited Edition

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100% Circularly produced
100% Recycled Stainless Steel – PuReSteel™
39mm diameter
Repurposed Soprod  C125 automatic GMT movement
200m-600ft water-resistant
Handmade sustainable leather strap
Swiss made

CHF 1,690.00


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Design DNA

The CB x ACE is a raw and "naked" watch by design an technical conception. Essential in all its lines and finishes. It has been designed and produced to have the least impact on the environment. Only the functionally necessary has been produced. Nothing is superfluous, like it should be for a tool watch.

Red GMT arrow-hands are iconic. On dashboard instruments, manometers and tools, the red color is commonly used to identify a precise function thanks to its readability.

The 1990s evoke the last era of mechanical devices; the first website went online in 1991, then things started to change. Today, displays have become mainly digital.

87.59% Sustainability score

The CB01 GMT's construction, production process and local supply chain give it an 87.59% sustainability score. This makes it 2.09 times more sustainable than a comparably priced series watch.

Read the report

Circular production

When we first approached the project, we thought that we just had to use recycled materials to succeed. Soon we’ve realized that a true sustainable project is much more than that. It's about finding what is needed from an existing “circle”, transform it into a new “circle” and, finally, make it ready for its future “circle”. 

In fact, to produce in cycles.


"Through this watch, we encourage all industry participants to do better for their next watch by using an objective and measurable sustainability index to measure their production. If we all work on improving the same measurable sustainability index, change will become a reality.  

This watch is a tribute to the women and men whose work contributes to a better future, and an ode to craftsmanship and the people of watchmaking.

Our wish is that the Swiss made label will one day include a minimum sustainability score".

Cedric Bellon & Alon Ben Joseph (Ace Jewelers)

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The watch


Type of Production

100% Circular
Swiss made
In-house production

Quality of production

Top grade

Case Size

39mm diameter

Case Features
  • 100% recycled 316L PuReSteel® stainless steel case-body
  • Repurposed 316L stainless steel from our factory scrap for case-back
  • Sapphire crystal
  • 24H inner dial ring
  • Brushed case-body, circular brushed lugs with polished bevels. Circular brushed case-back
  • Circular brushed bezel, polished on top
  • Vertically brushed dial with circular brused 24h ring
  • Double layer 100% recycled PuReSteel® vertically brushed dial
  • Circular brushed 24H dial ring from  100% recycled PuReSteel®
  • White Superluminova ® on H, M and GMT hands and on the indexes
  • Black PVD coated dial. Coated exploiting unused machine capacity 

Hand-made black genuine leather strap. Natural tanning without any chemicals. Stitching with natural linen cord and water-based glue. Pin-buckle made of repurposed 316L stainless steel from our factory scrap.

Strap width


Water Resistance


Sustainability score

2.09 times more sustainable than a similar category Swiss made series watch

The movement

Repurposed Swiss made automatic Soprod C125 

Hours, minutes, seconds, date and 24H GMT hand


Mechanical, self-winding, 28’800 bhp/4Hz

Power Reserve
Up to 42 hours


“As a long-time watch collector I immediately fell in love with this piece. What really stood out for me, is the circularity & sustainability aspect. I never realized that the watch industry is rather lagging in making their processes more “green”. I really enjoyed the open letter Cedric and Alon have written and it made me want to have a watch with a sustainability score in my collection!”


Angel for the CB X ACE Amsterdam