Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Moonshine Gold - Diamond / Purple Supernova / Alligator

The lug width is 18mm. This measurement is determined by the distance between the two case lugs where the strap attaches. It is essential to measure this correctly before ordering an aftermarket strap, as a 20mm or 22mm lug width would not fit properly. To verify, measure the distance between the protruding lugs on the case using a digital caliper or ruler: 18mm is the standard for this model.

For the Constellation 131.58.29.20.60.002, naturally tanned alligator is the most harmonious aesthetic choice. The characteristic grain of alligator – with its geometric texture and natural sheen – pairs perfectly with Sedna Gold, enhancing its rosy tone without visual competition. Alternatively, vegetable-tanned calf leather (Horween or Badalassi Carlo) in dark brown develops an aged patina over time, creating an elegant leather-to-metal contrast. If you prefer a more contemporary and versatile style, a NATO or structured fabric strap keeps the watch in the sporty-elegant register.

Changing the strap on a Constellation 131.58.29.20.60.002 requires two essential tools: a spring bar tool and a clean work surface. Position the watch face-down, locate the spring bars (small cylinders that run through the case lugs), then use the spring bar tool to gently push the bar from one side to the other until it comes out completely. The strap will release. To install the new strap, align the lugs with the case holes and reinsert the spring bars in the same manner. If you are unsure, contact a professional service: Casati Milano, for example, offers appointment-based assistance for precise customizations.

Any strap with an 18mm lug width is compatible. You will find dozens of options in online catalogs: alligator in various tannages, vegetable-tanned calf, NATO milspec, rubber straps, heavy canvas. On milanostraps.it you will find a selection of 18mm straps customizable in length, buckle type (pin buckle, deployante), leather choice and stitching color. Every strap is tested for compatibility with standard Omega spring bars.

Durability depends on leather quality, frequency of use, and climate conditions. High-quality alligator or vegetable-tanned calf from premium ateliers can last 5–8 years with regular use (4–5 days per week) before requiring replacement, though the leather will continue to age nobly, developing a sought-after patina. Lower-quality leather may show signs of wear after 2–3 years. Omega's Sedna Gold tends to oxidize slowly over time, imparting a mature patina: the strap should accompany this aesthetic evolution. Casati Milano offers an 18-month warranty on bespoke straps, with the possibility of supporting the strap over time through minor maintenance interventions.