Omega · Constellation
Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Yellow Gold / Snow / Bracelet
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 131.55.29.20.99.002 (aka: 13155292099002)
Selected for the 18 mm lug width
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
Hammered calfskin strap in cuoio€98
The Constellation 131.55.29.20.99.002 (aka: 13155292099002), seen from the bench
Frequently asked questions
What is the lug width of the Omega Constellation 131.55.29.20.99.002?
The lug width measures 18mm. This dimension is critical for strap compatibility: the case lugs are shaped to accommodate a strap of exactly 18mm width. It is essential to verify this measurement before purchasing an aftermarket strap, as it cannot be adjusted without mechanical intervention on the case.
What type of strap is recommended for the Constellation 131.55.29.20.99.002?
For a yellow gold watch with a 29mm diameter, cognac brown alligator represents the most balanced choice: it maintains the sophistication of the metal case without appearing excessive. Valid alternatives include dolomitic calf for those seeking an evolving patina over time, or shell cordovan for a rigidity that supports the compact diameter. For daily use and versatility, a navy NATO strap allows you to preserve the gold for more formal occasions.
How do you change the strap on the Constellation 131.55.29.20.99.002?
The Constellation comes with an integrated yellow gold bracelet with faceted links. To change the strap, you must remove the lug from the case using a specific tool (spring bar tool) supplied with most straps. The operation requires delicacy to avoid scratching the gold: if you are not experienced, it is advisable to contact a qualified watchmaker or the Casati Milano atelier for professional handling.
Is an aftermarket strap compatible with the reference 131.55.29.20.99.002 (13155292099002)?
Yes, provided the strap is made for <a href="/pages/termine-glossario/misura-ansa">lug width</a> 18mm. The artisanal straps from milanostraps.it in the 18mm category have been specifically calibrated for watches in this diameter range. It is advisable to confirm with the seller that the strap does not have excess leather that would compress the case lugs.
How long does a leather strap last on the Constellation 131.55.29.20.99.002?
The lifespan of a leather strap depends on use and maintenance. Premium quality alligator lasts an average of 3-5 years with moderate daily use, while shell cordovan resists up to 6-7 years thanks to denser muscle fiber. Dolomitic calf reaches 2-4 years. Excessive humidity, frequent water contact, and prolonged sun exposure significantly reduce longevity. Casati Milano straps include an 18-month warranty and allow replacement if the leather shows structural 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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

