Omega · Constellation

Strap for Constellation Co-Axial 27 Brushed Red Gold / Blue Supernova

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter27 mm
Reference123.50.27.20.53.001 (aka: 12350272053001)
FamilyConstellation
MovementOmega caliber 8521 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseRed Gold

Recommended spring bar

Spring bars Omega 18mm — single diameter

Technical match for lug width and diameter · lug 18 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Constellation 123.50.27.20.53.001 (aka: 12350272053001)

Selected for the 18 mm lug width

All 18 mm straps →

The Constellation 123.50.27.20.53.001 (aka: 12350272053001), seen from the bench

The Omega Constellation 123.50.27.20.53.001 is a 27mm red gold watch featuring the iconic four-griffin case signature. It houses the Omega Caliber 8521 Co-Axial movement with METAS Chronometer certification, delivering precision beyond COSC standards. The 18mm lug width accommodates standard aftermarket straps while maintaining aesthetic balance on elegant wrists.

Frequently asked questions

What is the lug width of the Omega Constellation 123.50.27.20.53.001?

The lug width is 18mm. This dimension is determined by the proportions of the 27mm case and ensures compatibility with standard 18mm straps. To verify it, measure the external distance between the two lugs of the case with a digital caliper, positioning yourself perpendicularly.

What is the best strap for the Omega Constellation 123.50.27.20.53.001 in rose gold?

A dark brown alligator with fine grain is the ideal choice: the crocodile texture naturally harmonizes with the rose gold case, creating aesthetic harmony. Alternatively, Italian calf leather with vegetable tanning offers comfort and noble aging. For casual variants, structured FKM rubber maintains sportiness without betraying the classic DNA.

How do I change the strap on my Omega Constellation?

Remove the spring bars using a specific fork tool or a pointed instrument. Position the watch on a soft base to avoid scratching the rose gold case. Gently extract the bar from the lug, unfasten the old strap, then insert the new one and reposition the bar in the holes. Verify that it is secure before wearing.

Is there an aftermarket strap compatible with the 123.50.27.20.53.001?

Yes, perfectly. All straps with 18mm lug width are compatible. On milanostraps.it you will find a curated collection of models in alligator, calf and rubber, customizable in sizes, colors and details. The Casati Milano atelier creates bespoke straps with 18-month warranty.

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

The durability depends on use and tanning method. Quality calf leather with vegetable tanning lasts 3-5 years with daily use. Chromium-tanned alligator tends to resist 4-7 years. Leather ages gracefully, developing patina. Summer and humidity accelerate wear. Bespoke Casati Milano straps include 18-month warranty and can be regenerated or replaced.

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