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Omega · Constellation

Strap for Omega Constellation 123.20.35.20.63.001

The Constellation Co-Axial 35 Stainless Steel / Red Gold / Brown takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Omega
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Lug width20 mm
Case diameter35 mm
Reference123.20.35.20.63.001 (aka: 12320352063001)
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

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All Omega spring barsOpen →

Straps for the Constellation 123.20.35.20.63.001

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

What I'm asked about the Omega Constellation 123.20.35.20.63.001

What strap size does the Omega Constellation 123.20.35.20.63.001 take?

The Omega Constellation 123.20.35.20.63.001 needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Omega Constellation 123.20.35.20.63.001 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Omega Constellation 123.20.35.20.63.001?

Yes, in 20 mm leather. On a 35 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the Omega Constellation 123.20.35.20.63.001?

A 20 mm calf strap, for every day. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

The Constellation 123.20.35.20.63.001, seen from the bench

The Omega Constellation reference 123.20.35.20.63.001 features the automatic caliber 2500 with co-axial escapement and chronometer certification. The movement provides hour, minute, central second and date indications. The case has a diameter of 35mm according to the reference nomenclature.

Frequently asked questions

Can I use a 20mm strap from another brand on my Constellation 123.20.35.20.63.001?

Yes, any strap with a 20mm lug width is compatible, provided the actual width is precise. However, to enhance the specific proportions of this 35mm two-tone case, we recommend straps made with premium leathers: alligator, vegetable-tanned calf, shell cordovan or dense fabric NATO. Avoid glossy varnished leather straps, which would create an aesthetic contrast unsuitable to the formal-elegant character of the Constellation.

How long does a natural leather strap last on a watch worn daily?

An alligator strap, with proper care and not constantly exposed to rain or intense perspiration, lasts 5-8 years. Vegetable-tanned calf, being more porous, requires slightly more maintenance but can exceed 10 years if protected from excessive moisture. Shell cordovan is the most long-lasting material, reaching even 15-20 years, thanks to its exceptionally dense structure that makes it virtually waterproof. We recommend air-drying the strap after exposure to humidity and applying a vegetable leather conditioner at least twice a year.

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

The atelier's website: casatimilano.com