Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel / Sedna Gold / MOP

The lug width is 18mm. This width is specific to this 29mm case model and ensures optimal aesthetic proportion. To verify strap compatibility, measure the distance between the two case lugs using a caliper or soft measuring tape.

Alligator leather in dark tones (black or smoked brown) is the most eloquent choice, as the anatomical grain of the skin amplifies the luxurious detail of the Sedna Gold finish without competing visually with the mother-of-pearl dial. Box calf and shell cordovan are valid alternatives for those preferring smooth texture or controlled aging.

Use a dedicated spring bar tool to extract the spring bars. Position the watch with the lug facing toward you, insert the tool into the upper hole of the spring bar to release it from the internal spring, then extract the spring bar. Repeat for the lower lug. Insert the new spring bars into the strap, then secure the strap to the case. Verify that the spring bars are firmly inserted.

Yes, any strap with an 18mm lug width is compatible. Artisanal straps in alligator, calf, and cordovan offer superior construction quality compared to generic straps. Ensure the strap has appropriate spring bars for the lug width and that the buckle finish complements the tone of the hybrid case (steel and Sedna Gold).

An artisanal alligator or calf leather strap has an average lifespan of 3-5 years with regular use, depending on climate and frequency of use. The mother-of-pearl dial and 18mm lug width are specific to an elegant model not intended for water sports; a natural leather strap will age with fascinating patina. Casati Milano guarantees 18 months on custom-made straps.