Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Stainless Steel - Yellow Gold - Diamond / Moonshine Meteorite

The Omega Constellation 29mm ref. 131.25.29.20.99.002 has a lug width of 18mm. This dimension is measured internally between the two anchoring shoulders on the case and determines strap compatibility. Any 18mm strap will fit without mechanical play.

For this 29mm Constellation we recommend pure black alligator for maximum formal elegance, or vegetable-tanned calf in dark cognac tones for those desiring aging patina. Both materials enhance the two-tone case and meteorite dial without chromatic competition.

Remove the original bracelet using a spring bar tool: insert the thin tip into the lateral grooves of the spring, push inward and gently lift the lug. Repeat on the other side. Insert the new 18mm strap by sliding the ends through the lugs until the spring snaps into position.

Yes, reference 13125292099002 is the extended nomenclature of the same Omega Constellation 131.25.29.20.99.002. Both numbering schemes identify the same watch with 29mm case and 18mm lug width, so all 18mm straps are compatible.

A quality alligator strap on a 29mm Constellation lasts an average of 3–5 years with regular rotation (worn 4–5 days a week). Vegetable-tanned calf resists for 2–4 years and ages nobly in appearance. Durability depends on ambient humidity, frequency of use, and maintenance practices.