Omega · Constellation
Strap for Constellation Quartz 25.5 My Choice White Gold / White
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Constellation 1173.76.00
Selected for the 18 mm lug width
Hammered Calfskin Strap Light Blue€98
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Pink Strap with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Grey Hammered Leather Strap with Ecru Stitching€98
Swift Red Leather Strap€120
The Constellation 1173.76.00, seen from the bench
Frequently asked questions
What is the exact lug width of the Omega Constellation 1173.76.00?
The Omega Constellation 1173.76.00 features a lug width of 18mm. This measurement is the distance between the inner base of one lug and the other, and is fundamental to ensure perfect compatibility with any replacement strap. An error of even a few tenths of a millimeter would result in unwanted lateral play or failure of the strap to seat properly on the lugs.
Which strap material is most suitable for the Constellation 1173.76.00 in white gold?
Alligator remains the most natural choice for the 1173.76.00 in white gold, thanks to its caracollo texture that optically complements the surface texture of white gold and the case lugs. Shell cordovan represents the premium alternative for those desiring a patina that becomes richer over time. Vegetable-tanned calfskin offers a modern balance between lightness and the promise of noble aging.
How do you change the strap on a watch with integrated lugs?
Watches with integrated lugs (such as the 1173.76.00) require the use of a specific tool to remove the pin that connects the strap to the lugs. The operation cannot be performed manually: it is necessary to resort to a professional watchmaker or specialized services such as Casati Milano, which has the appropriate tools and expertise to avoid damaging the case during the intervention.
Is an aftermarket strap in 18mm lug width truly compatible with the 1173.76.00?
Yes, any strap manufactured for the 18mm lug width is geometrically compatible with the 1173.76.00. However, aesthetic compatibility depends on the choice of leather, color, and finish. The 18mm width is a consolidated standard for Omega's women's collections of this generation, ensuring a wide range of options both online and at specialized ateliers.
How long does a leather strap last on a watch like the Constellation 1173.76.00?
The lifespan of a leather strap depends on the quality of the raw material, the tanning process, and the intensity of use. A strap in excellent shell cordovan or alligator can maintain structural integrity for 5-8 years of daily use, developing an increasingly fascinating patina. Calfskin, being more delicate, tends to show the first signs of wear around 3-5 years. The 18-month warranty offered by Casati Milano covers manufacturing defects and ensures replacements in case of issues due to craftsmanship.
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

