Omega · Constellation

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

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

Integrated bracelet

The Omega Constellation 123.20.38.21.63.001 (aka: 12320382163001) 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
Reference123.20.38.21.63.001 (aka: 12320382163001)
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 123.20.38.21.63.001 (aka: 12320382163001), seen from the bench

The Omega Constellation reference 123.20.38.21.63.001 is powered by the automatic caliber 8500 with co-axial escapement and chronometer certification. The movement offers hour, minute, second and date indications. The watch is part of the Constellation collection of the Swiss brand.

Frequently asked questions

Can a strap be mounted on the Omega Constellation 123.20.38.21.63.001?

No, not a standard one with straight bars: the bracelet attachment is integrated into the case, part of the original design. A proper strap exists and is constructed bespoke directly on the watch by <a href="/pages/casati-booking">Casati Milano</a>. This method ensures perfect fit and visual continuity with the griffes.

How does the bespoke strap production process work for this model?

The atelier measures the case and proprietary lug directly on the watch, takes wrist measurements, discusses leather and buckle selection. The leather is then hand-worked and stitched, constructed literally on the case to ensure the interface is flawless. Timeline and finishing details are agreed during the consultation.

Which type of leather suits the two-tone Omega Constellation in rose gold and steel?

Natural aged leathers with pronounced grain dialogue elegantly with rose gold, creating luminous contrast. Smoother leathers in hazel or deep brown tones emphasise the steel's sporty character. Vegetable-tanned leathers offer rich colour saturation and develop unique patina over time. The choice reflects the personal character you wish to emphasise.

How long does a bespoke strap made by a quality atelier last?

A strap crafted from selected natural leather with artisan stitching lasts for years with minimal maintenance. Durability depends on use, care, and leather type: aged leathers improve with time, while delicate ones require protection from moisture and extreme heat. A quality atelier advises on the most durable leather for your lifestyle.

Why is the Constellation 123.20.38.21.63.001 considered iconic despite being launched in 1982?

The four rose gold griffes embracing the sapphire crystal became instantly recognisable, transforming into the Constellation's visual identity marker. The integrated case architecture, the 8500 co-axial calibre, and the 38-millimetre proportion create an aesthetic and technical balance that has proven timeless. It is iconic because its geometry is irreplicable and its sporty-elegant character remains contemporary.

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