Strap for Constellation Manhattan 29 Co-Axial Master Chronometer Sedna Gold / Diamond / Blue Aventurine

The lug width of the Omega Constellation 131.58.29.20.99.006 is 18mm. This measurement represents the distance between the inner shoulders of the lugs and determines full compatibility with any aftermarket strap. An 18mm strap inserts with precision into the lugs without play, ensuring correct interface between wrist and Sedna Gold case.

For a 29mm Sedna Gold watch, brown or cognac alligator represents the classic choice: the natural texture of the scales dialogues perfectly with the warm tone of rose gold. Alternatively, shell cordovan develops rich patina over time and offers elegant contrast. For daily wear, softened calf leather ensures comfort and fluidity. FKM rubber is ideal for those who prioritise practical everyday use.

The strap is replaced using a spring bar tool (dedicated instrument). Remove the horizontal metal bar connecting the strap to the lugs by applying downward pressure and pulling towards you. Once free, remove the old strap. Insert the new strap by aligning the holes at the ends to the bar, then reintroduce the spring bar into the lugs until you hear the security click. The operation requires care to avoid scratching the gold case.

Yes, any strap with an 18mm attachment is perfectly compatible with the 131.58.29.20.99.006. Omega certification ensures that movement and case architecture remain unaltered. The use of aftermarket straps in precious leather, rubber or special textiles does not invalidate the guarantee, provided the change is executed correctly without damaging the lugs or case.

A high-quality alligator strap typically lasts 3-5 years with daily wear, depending on climate, humidity and frequency of use. Shell cordovan, being more resistant, can last 5-7 years. Calf leather, more delicate, requires replacement every 2-3 years. Rose gold, by contrast, has virtually unlimited lifespan; the strap is the component subject to natural wear and should be considered a consumable item, like the tyres on a car.