Omega · Constellation
Strap for Constellation Co-Axial 31 White Gold / Snow / Diamond Supernova
Integrated bracelet: measurements, the most common questions, and the way to a made-to-measure strap.
Integrated bracelet
The Omega Constellation 123.55.31.20.55.009 (aka: 12355312055009) 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.
Recommended spring bar
The Constellation 123.55.31.20.55.009 (aka: 12355312055009), seen from the bench
Frequently asked questions
Can you fit a standard strap on this Omega Constellation?
No. The bracelet is integrated into the case and the attachments are proprietary — a conventional strap won't fit. For this model, I craft a bespoke strap directly in the workshop, built to the precise geometry of your case.
How does the bespoke strap process work for the Constellation?
Visit the <a href="/pages/casati-booking">Atelier Casati Milano</a>, by appointment. I take measurements directly from your case — the proprietary attachments require millimetre precision. I craft the connector and strap, calibrated to your watch.
Which leather would you recommend for a Constellation with mother-of-pearl dial?
I prefer Mississippi Alligator with mirrored scales — it reflects light like the iridescent dial does, creating a natural dialogue between leather and yellow gold. Premium Veau Swift is the alternative if you want a more understated character but still refined.
How long does a well-made strap last?
With mindful wear and minimal care — avoid prolonged moisture, clean occasionally — a hand-crafted strap will serve you for 5-7 years. The leather ages beautifully, developing a patina that tells the story of time shared with your watch.
Why was the Constellation designed with an integrated bracelet?
The 1950s Constellation was born as a sports chronometer of precision. The integrated bracelet provides case rigidity and protects the proprietary attachments. A bespoke strap honours that philosophy: practical, elegant, built for your wrist.
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