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Omega · Constellation

Strap for Constellation Co-Axial 35 Yellow Gold / Silver Omega

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
Lug width20 mm
Case diameter35 mm
Reference123.50.35.20.52.004 (aka: 12350352052004)
FamilyConstellation
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
CaseYellow Gold

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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Straps for the Constellation 123.50.35.20.52.004 (aka: 12350352052004)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Constellation 123.50.35.20.52.004 (aka: 12350352052004), seen from the bench

The Omega Constellation 123.50.35.20.52.004 is a modern embodiment of an iconic timepiece launched in 1952, the first production automatic chronometer that redefined watchmaking precision standards. This 35mm yellow gold version features the signature four "griffes" characteristic lugs and a mother-of-pearl dial, powered by the Omega 2500 calibre with Co-Axial Escapement technology that reduces friction and extends service intervals. The 20mm lug width is proportioned perfectly to the case diameter, and the power reserve exceeds 40 days.

Frequently asked questions

What is the lug width of the Omega Constellation 123.50.35.20.52.004?

The lug width is 20mm. This width is proportionate to the 35mm case and allows the use of quality handcrafted straps without construction compromises. To verify compatibility, measure the space between the case lugs: it must be exactly 20mm.

What is the best strap for the Omega Constellation 123.50.35.20.52.004?

Vegetable-tanned alligator is the most refined choice for this model: the grain of crocodile belly creates plays of light that evolve over time, developing a characteristic patina. Shell cordovan is an excellent alternative for those seeking a compact structure and a color that darkens naturally. Vegetable-tanned calf leather represents an intelligent compromise between quality and investment.

How do I change the strap on my Omega Constellation 123.50.35.20.52.004?

Remove the original strap by sliding the spring bars out from the case lugs. Use a small tool (spring bar tool) to facilitate the operation, gently leveraging the bars. Then insert the new spring bars of the handcrafted strap into the lugs, ensuring they enter without forcing. If you are not experienced, consult a professional watchmaker to avoid damage to the lugs.

Is the Constellation 123.50.35.20.52.004 compatible with 20mm aftermarket straps?

Yes, it is fully compatible. All handcrafted straps made with 20mm lug width fit perfectly on this model. The standardized width allows you to choose from a wide range of materials, finishes and constructions without technical limitations.

How long does a leather strap last on the Omega Constellation 123.50.35.20.52.004?

Durability depends on the tanning and usage. A strap in alligator or shell cordovan with vegetable tanning, worn daily, maintains optimal functionality for 3-5 years; calf leather, being softer, for 2-3 years. With proper maintenance (gentle cleaning, rotation between multiple straps), the timeframes extend significantly. Casati Milano straps include an 18-month warranty.

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