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Omega · Constellation

Strap for Constellation Co-Axial 27 Brushed Stainless Steel / Diamond / White MOP

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

16mm
16 mm strapsAll Omega
Lug width16 mm
Case diameter27 mm
Reference123.15.27.20.55.003 (aka: 12315272055003)
FamilyConstellation
MovementOmega caliber 8520 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseStainless Steel

Spring bar

Spring bars for Omega

The right category for this model · choose the 16 mm size

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Straps for the Constellation 123.15.27.20.55.003 (aka: 12315272055003)

Selected for the 16 mm lug width

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The Constellation 123.15.27.20.55.003 (aka: 12315272055003), seen from the bench

The Omega Constellation reference 123.15.27.20.55.003 is equipped with the automatic Calibre 8520 with co-axial escapement and chronometer certification. The movement provides hour, minute, second and date indication. The watch belongs to Omega's Constellation collection, characterized by the distinctive design with claws on the bezel.

Frequently asked questions

What is the lug width of the Omega Constellation 123.15.27.20.55.003?

The lug width of the Constellation 123.15.27.20.55.003 is exactly 16mm, that is the distance between the pins that pass through the lugs of the 27mm case. This proportion is calibrated to maintain the visual balance of the women's model and is not negotiable in case of strap replacement.

What is the best strap for the Constellation 123.15.27.20.55.003?

For this watch we recommend alligator with vegetable tanning (cognac or burgundy for formal occasions), nappa calf (visible natural aging), or silk NATO for summer. The choice depends on the use context: business requires alligator or calf, evening occasions prefer dark burgundy, daily wear suits satin black.

How do you change the strap on the Constellation 123.15.27.20.55.003?

Remove the current strap using a cased lever for the pins: gently press the pins from the underside of the case until they snap out. Insert the new 16mm strap by aligning the holes with the metal protusions and push the pins until they click into position. Avoid hammers: the fit must be precise but not forced.

Which aftermarket straps are compatible with the Constellation 123.15.27.20.55.003?

Any strap with 16mm lug width is compatible. You will find online a dedicated collection of <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-16mm">16mm straps</a> in alligator, calf, NATO and rubber. Casati Milano also creates customized versions with tanning of your choice and 18-month warranty.

How long does a leather strap last on a Constellation 123.15.27.20.55.003?

An alligator or calf strap with vegetable tanning typically lasts 3-5 years in daily urban use, considering natural wear at the bending point and leather aging. Exposure to direct sunlight, humidity and sweat shortens the lifespan. Casati Milano straps include 18-month warranty against manufacturing defects and hidden leather defects.

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