Omega · Constellation

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

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter35 mm
Reference123.20.35.20.02.005 (aka: 12320352002005)
FamilyConstellation
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
CaseRed Gold, Stainless Steel

Recommended spring bar

Spring bars Omega Speedmaster Seamaster 19mm

Technical match for lug width and diameter · lug 19 mm · Ø 1.8 mm

All Omega spring barsOpen →

The Constellation 123.20.35.20.02.005 (aka: 12320352002005), seen from the bench

The Omega Constellation 123.20.35.20.02.005 (ref. 12320352002005) is a contemporary evolution of an icon born in 1982, featuring a 35mm case in stainless steel and red gold with distinctive design elements including sapphire crystal with applied indexes and engraved Roman numerals on the bezel. The watch houses the Omega 2500 Co-Axial calibre with COSC-certified chronometer escapement and offers 100 metres water resistance. The 19mm lug width is proportioned to the 35mm case diameter for optimal visual harmony.

Frequently asked questions

What is the exact lug width of the Omega Constellation 123.20.35.20.02.005?

The Omega Constellation 123.20.35.20.02.005 has a lug width of 19mm, measured perpendicularly between the two case attachment holes. This dimension is standard for the 35mm Constellation line and ensures perfect optical proportions relative to the case diameter.

What strap do you recommend for the Constellation 123.20.35.20.02.005 in rose gold?

For the rose gold and steel variant, we recommend cognac or dark brown alligator, which amplifies the warmth of the precious metal. If you prefer alternative options, burgundy shell cordovan or vegetable-tanned brown calf offer refined aesthetics with a patina that evolves over time.

How do you correctly measure the lug width for this watch?

Lug width is measured perpendicularly between the two attachment holes, excluding the attachment lugs themselves. In the case of the 35mm 123.20.35.20.02.005, the distance is 19mm. Use a digital caliper for maximum precision and verify that the strap thickness does not exceed 4.5-5mm.

Can I use an aftermarket strap on this Omega Constellation?

Yes, any strap with a 19mm lug width is compatible with the 123.20.35.20.02.005. We recommend verifying the compatibility of the attachment lugs and the maximum thickness of the strap. At milanostraps.it you will find a selection of 19mm straps optimized for this model, customizable to size.

How long does a leather strap last on a watch like this?

Durability depends on the quality of the leather and usage. A superior quality alligator or shell cordovan with vegetable tanning generally lasts 3-4 years under normal use conditions. Vegetable-tanned leather develops patina over time and improves aesthetically. A premium leather Casati Milano strap comes with an 18-month warranty and can be repaired or reconditioned.

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