Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel / Sedna Gold / Diamond / Green Aventurine

The lug width measurement for the 131.28.29.20.99.001 model is 18 millimeters. This specification is essential when purchasing a compatible strap: the width must match exactly. Many online retailers make cataloging errors, so always verify directly with official Omega specifications or contact your retailer for confirmation before purchase.

Vegetable-tanned alligator is the most historically and aesthetically coherent choice for this model. The natural texture of alligator pairs perfectly with the aventurine dial and two-tone case. Calf leather represents a valid alternative for those preferring a more uniform surface. We do not recommend standard rubber and silicone as they visually compromise the proportional balance of the 29mm case.

The watch is equipped with spring bars. Use a dedicated tool to release the spring bar by gently pressing on the small lateral opening, then extract the bar. Repeat on the other side to remove the old strap. To install the new strap, align the ends with the case holes, insert the spring bar, and ensure it is fully locked. If you are not experienced, contact an Omega service center or a specialized watchmaker to avoid damage.

Yes, it is fully compatible with quality aftermarket straps, provided they respect the 18mm lug width and have a corresponding nominal width. Artisanal straps in alligator, calf, and vegetable-tanned leather often offer superior construction quality compared to OEM straps, with hand-stitching and more refined finishing. Always verify that the strap does not have rigid lugs that prevent insertion into the spring bars.

A quality leather strap, with vegetable tanning, typically lasts 3-5 years under normal daily wear conditions. Durability depends on factors such as frequency of wear, ambient humidity, perspiration, and care. An alligator strap tends to last slightly longer than calf leather due to the denser structure of the skin. The patina that develops over time does not indicate deterioration, but rather noble aging of the leather.