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

The Omega Constellation 131.28.29.20.99.002 has a lug width of 18mm. This measurement represents the net distance between the two spring bars that secure the strap to the case. When purchasing an aftermarket strap, ensure it is sized exactly at 18mm to guarantee perfect mechanical compatibility and the absence of play or excessive tension.

For the 131.28.29.20.99.002 with its two-tone case in Sedna Gold and steel, a dark brown or cognac alligator strap enhances the warmth of the precious metal without competing with the aventurine dial. Alternatively, a vegetable-tanned calf or burgundy shell cordovan create contemporary chromatic pairings and develop a natural patina over time, just like the case.

To change the strap on the Constellation, you need a small-diameter tool – a spring bar remover or spring bar tool. Position the watch face down, locate the horizontal spring bar between the case and the strap, then gently push downward on the end of the bar with the tool. Once released, the spring bar retracts and the strap detaches. Repeat on the other side, then insert the new strap by aligning it with the terminals and press the spring bar until it clicks into the secure position.

Yes, any strap with an 18mm lug width is mechanically compatible with the 131.28.29.20.99.002. However, for optimal visual results, we recommend artisanal-quality straps in alligator, calf, or cordovan that preserve the timeless elegance of the Constellation and harmonize with the two-tone case materials.

The durability of a leather strap depends on the quality of the leather, daily use, and care. A high-quality alligator or calf strap with vegetable tanning lasts an average of 3-5 years of regular use before requiring replacement due to aesthetic wear. Shell cordovan and artisanal-quality leathers can exceed 5-7 years. Aging is not a defect but an added value: patina, creases, and tonal variations tell the story of your watch.