Omega · Constellation

Strap for Constellation Co-Axial 35 Stainless Steel / MOP Supernova / Alligator

Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.

Integrated bracelet

The Omega Constellation 123.13.35.20.55.001 (aka: 12313352055001) is designed with a bracelet integrated into the case. For a compatible made-to-measure strap, the Casati Milano atelier builds it on your watch.

Case diameter35 mm
Reference123.13.35.20.55.001 (aka: 12313352055001)
FamilyConstellation
MovementOmega caliber 2500 hours, minutes, seconds | date | co-Axial escapement, chronometer
CaseStainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

The Constellation 123.13.35.20.55.001 (aka: 12313352055001), seen from the bench

The Constellation Co-Axial 35 features a 35mm stainless steel case with Mother-of-Pearl Supernova dial and is fitted with an alligator leather strap. This model represents Omega's elegant watchmaking heritage spanning over 70 years, characterized by its distinctive four-claw design embracing the sapphire crystal. The custom strap integration respects the iconic architecture of the integrated bracelet-case transition.

Frequently asked questions

Can I fit a standard strap on the Omega Constellation 123.13.35.20.55.001?

No. The bracelet is integrated into the case: the lug attachment is proprietary and a standard strap won't fit. For this model I build everything bespoke directly on the watch, in the atelier.

How does the bespoke strap work for the Constellation?

We work exclusively at <a href="/pages/casati-booking">Casati Milano</a>, by appointment only. I take measurements directly from the case and the lugs, studying the transition between the original bracelet and the new strap millimetre by millimetre. It's craftsmanship that requires time and precision.

Which leather do you recommend for the Constellation?

I prefer Swift or Barenia. The Constellation is both sporty and refined: Swift gives it contemporary clarity and a patina that ages beautifully. Barenia, richer in character, brings depth to the wrist. Mississippi Alligator remains the choice for those seeking maximum refinement.

How long does a well-made strap last?

With conscious wear and light maintenance, 8 to 12 years. Leather isn't immortal, but it ages with dignity. A light cream application now and then, protection from direct sun, and the strap tells your story without tiring. When the time truly comes, I remake it.

The Constellation's lugs – those four horns – do they limit strap choice?

No, quite the opposite. They are the soul of the design: that's why I respect them in my work. I study how the strap enters the lugs, how the leather colour dialogues with the steel. It's a constraint that becomes a true artisanal challenge. Not compromise: architecture.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only