Omega · Constellation

Strap for Constellation 35.5 Automatic Chronometer Stainless Steel / Yellow Gold / Champagne

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

Integrated bracelet

The Omega Constellation 1203.15.00 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 diameter36 mm
Reference1203.15.00
FamilyConstellation
MovementOmega caliber 1120 hours, minutes, seconds | date | chronometer
Year1999
CaseYellow Gold, Stainless 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

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The Constellation 1203.15.00, seen from the bench

The Constellation represents one of Omega's classic lines, characterized by the automatic caliber 1120 with chronometer certification. The watch offers indication of hours, minutes, seconds and date. The 1203.15.00 reference is part of the brand's Constellation collection tradition.

Frequently asked questions

Can I fit a standard strap to the Omega Constellation 1203.15.00?

No. The bracelet is integrated into the case: the attachment is proprietary and a standard strap won't fit. What I do in the atelier is craft a custom strap, modelled directly onto your watch. It's not an adaptation—it's a solution conceived for your timepiece.

How does the custom strap process work for this model?

We work by appointment only at <a href="/pages/casati-booking">Casati Milano</a>. I take measurements directly from the case, accounting for the geometry of the lateral griffes and the yellow gold-steel bicolour. Every attachment is built by hand, millimetre by millimetre, to respect the original design.

Which leather do you recommend for the Constellation 1203.15.00?

I favour Barenia leather. This model lives between sport and elegance, and Barenia ages gracefully, developing patina in harmony with the case's gold. If you love the solidity of steel, Tuscan Leather is the choice: robust, crisp, it underlines the timepiece's geometric character.

How long does a well-made strap last?

A handcrafted strap lasts 5–7 years in daily wear, sometimes longer. It depends on care: avoid excessive moisture, keep it clean. Leather ages and changes, but that's beauty, not decay. When it ages well, it tells the story of the watch.

Why does the Constellation keep its integrated bracelet after 70 years?

Because it is identity. The lateral griffes are not merely engineering: they are the visual language that makes the Constellation instantly recognisable. The integrated bracelet is part of that language, just as the bicolour case is. To change it would be to erase the design. That's why, when we intervene, we respect it absolutely.

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.

Request an appointment →

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