Omega · Constellation

Strap for Constellation Co-Axial 38 Stainless Steel / Grey Lozenge

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

Integrated bracelet

The Omega Constellation 123.10.38.21.06.002 (aka: 12310382106002) 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
Reference123.10.38.21.06.002 (aka: 12310382106002)
FamilyConstellation
MovementOmega caliber 8500 hours, minutes, seconds | date | chronometer, co-Axial escapement
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 123.10.38.21.06.002 (aka: 12310382106002), seen from the bench

The Constellation represents one of Omega's historic collections, characterized by the distinctive design with 'griffes' on the case. This model mounts the automatic 8500 caliber with co-axial escapement and chronometer certification. The functions include hours, minutes, seconds and date.

Frequently asked questions

Can I fit a standard strap on the Omega Constellation 123.10.38.21.06.002?

No, the bracelet is integrated into the case. The lug attachment isn't universal: a standard strap won't fit. If you want to change, the only option is a bespoke strap made in the workshop, hand-modelled to match the geometry of your lugs.

How does the bespoke strap process work for the Constellation?

I work by appointment only at <a href="/pages/casati-booking">Casati Milano</a>. I take measurements directly from your case, assess the lug profile and build the strap from scratch. It's not assembly work: it's handcraft that respects every architectural detail of your watch.

Which leather do you recommend for the Constellation?

I favour Mississippi alligator with broad scales: it preserves the Swiss formal elegance that Omega designed in the Fifties—that clean line. If you want something warmer and more alive, honey Barenia evolves beautifully over time, developing a patina that tells the story of wear.

How long does a well-made strap last?

A good leather strap lasts years, often a decade if treated with care. Leather ages naturally—the fibres soften, the colour deepens. It's not deterioration: it's evolution. Minimal maintenance, perhaps a neutral cream once a year, extends everything.

Why does the Constellation have those four griffes on the bezel?

They've been Omega's signature since 1952: four conical lugs that embrace the sapphire crystal. They started as a constructive choice—securing and protecting the glass—but became aesthetic language. I've worked on many Constellations: that geometry is instantly recognisable, exactly as Omega conceived it.

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