Omega · Constellation

Strap for Constellation Co-Axial 35 Stainless Steel / Red Gold / Silver Omega

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter35 mm
Reference123.20.35.20.52.003 (aka: 12320352052003)
FamilyConstellation
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
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 →

Straps for the Constellation 123.20.35.20.52.003 (aka: 12320352052003)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Constellation 123.20.35.20.52.003 (aka: 12320352052003), seen from the bench

The Omega Constellation is powered by the automatic caliber 2500 with co-axial escapement and chronometer certification. The movement offers hour, minute, second and date indications. The reference 123.20.35.20.52.003 features a 35mm case according to the standard specifications of the collection.

Frequently asked questions

What is the lug width of the Omega Constellation 123.20.35.20.52.003?

The Omega Constellation 123.20.35.20.52.003 has a lug width of 20mm. This width is measured between the horizontal metal pins that connect the case to the straps. It is essential to verify compatibility by measuring the distance from the inner edge to the inner edge of the pins before purchasing an aftermarket strap.

Which strap pairs best with the bicolor Constellation 123.20.35.20.52.003?

For the bicolor Constellation in rose gold and steel, we recommend an alligator strap in black, dark brown, or deep blue. Genuine alligator offers the regular texture and density that reflect the quality of the case. For those preferring natural patina, vegetable-tanned calf in cognac or hazelnut brown tones complements the golden component of the case.

How do you change the strap on the Omega Constellation 123.20.35.20.52.003?

Removing the strap requires a specific tool (spring bar remover). Insert the flat tip into the small lateral groove of the thin spring that supports the pin, apply gentle pressure to retract the spring, then extract the pin. Repeat on both sides. To install the new strap, align the holes with the pins and slide the pins into the lugs of the new strap until they click into place.

Is a 20mm aftermarket strap compatible with this Constellation?

Yes, any strap with a 20mm lug width is compatible with the Constellation 123.20.35.20.52.003, provided the strap pins fit securely into the case lugs (without forcing and without play). We recommend verifying leather quality (alligator, calf, cordovan) to ensure durability and an appearance befitting a timepiece of this caliber.

How long does a leather strap last on an Omega Constellation?

A genuine alligator strap or artisanal vegetable-tanned calf strap typically lasts 8-10 years with regular daily use, provided it is properly maintained (dried after moisture exposure, periodically cleaned with a soft cloth). Cordovan, thanks to its superior density, can exceed 10 years. Natural wear includes thinning of the leather in bending areas and a slight color variation.

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