Strap for Constellation Co-Axial 27 Brushed Yellow Gold / Diamond / MOP Stars

The Omega Constellation model 123.55.27.20.05.001 has a lug width of 17mm. This dimension is precise and does not allow approximations: a strap with a 16mm or 18mm lug width will not fit correctly. The measurement is taken by verifying the internal distance between the pins that connect the case to the bracelet. It is essential to check this measurement before ordering an aftermarket strap to avoid mechanical incompatibility.

Alligator represents the classic choice par excellence: the natural texture of geometric shields creates visual harmony with the sunburst dial and the patina that develops over time enhances the gold of the case. Shell cordovan is the ultimate choice for those seeking artisanal luxury, offering extraordinary resistance and natural luster. Vegetable-tanned leather is a sophisticated alternative with ethical tanning. Rubber is not recommended for daily use on this elegant model.

The integrated Manhattan bracelet can be removed with specific tools (spring bar tool). Light lateral pressure is applied to the pins to release them from their seats, then the bracelet is extracted. The new 17mm lug width strap is inserted by aligning the holes with the pins, gently levering until you feel the locking click. If you do not have the correct tool or prefer professional intervention, the Casati Milano atelier offers precise installation with tension verification.

Any strap with a 17mm lug width is mechanically compatible. On milanostraps.it you will find a selection of models in alligator, leather, cordovan and vegetable-tanned leather, all available in the correct size for reference 123.55.27.20.05.001. Aesthetic compatibility depends on your style: alligator is a universal choice, cordovan maximizes luxury, vegetable-tanned leather balances elegance and ethical awareness.

A high-quality alligator or leather strap typically lasts 3-5 years with moderate daily wear, with appropriate maintenance (avoid excessive moisture, condition with specific balm periodically). Shell cordovan has extraordinary longevity, often exceeding 7-10 years thanks to exceptional cellular density. Lifespan depends on frequency of wear, climate (humidity accelerates wear), and storage care. The 18-month warranty offered by Casati Milano covers manufacturing and workmanship defects.