Omega · Constellation

Strap for Constellation Co-Axial 38 Stainless Steel / Red Gold / Grey

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

Integrated bracelet

The Omega Constellation 123.20.38.21.06.002 (aka: 12320382106002) 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 diameter38 mm
Reference123.20.38.21.06.002 (aka: 12320382106002)
FamilyConstellation
MovementOmega caliber 8500 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseRed 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

All Omega spring barsOpen →

The Constellation 123.20.38.21.06.002 (aka: 12320382106002), seen from the bench

The Omega Constellation Co-Axial 38 combines stainless steel and red gold in a 38 mm case, featuring the signature integrated bracelet with sculptural lugs. Designed in 1952, this model exemplifies Swiss watchmaking elegance with its bimetallic construction and distinctive architectural design.

Frequently asked questions

Can I fit a standard strap onto the Omega Constellation 123.20.38.21.06.002?

No, the bracelet is integrated directly into the case — there's no lug for standard straps. I've seen clients try quick fixes: they don't work. The only way is to have a bespoke strap made in the atelier, tailored to your specific case geometry.

How does the bespoke strap process work for this Constellation?

I work only at <a href="/pages/casati-booking">Casati Milano</a>, by appointment. I take measurements directly from your case — the attachment points, width, angles. Every detail is calibrated by hand because no two cases are identical, even within the same series.

Which leather do you recommend for this model?

I prefer Mississippi Alligator with large scales or extra-soft French Barenia. The Constellation is elegant but has broad shoulders and a sporty character beneath the red gold — the leather must breathe and age with dignity, not suffocate. Alligator develops a splendid patina over years.

How long does a well-made strap last?

A properly maintained strap lasts 6–8 years, sometimes longer. It depends on use: if you remove it every evening, it lasts longer. Good leather ages visibly — it deepens in colour, gains character. It's not wear, it's transformation.

Why does the Constellation have those 'griffes' on the case?

The griffes were born in 1952 as an aesthetic signature: they embrace and protect the crystal. It's not just form — it's architecture. That's why the strap must dialogue with that geometry, not fight it. In the atelier I model every curve to respect that original vision.

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