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

The lug width of the Omega Constellation 131.20.29.20.55.001 is 18 millimetres. This measurement represents the distance between the case lugs and is essential for selecting a compatible strap. Always verify this dimension before purchase, as 16mm or 20mm straps will not fit correctly onto the lugs of this case.

For this 29mm variant with mother-of-pearl and Sedna Gold, we recommend black or dark brown alligator straps, which create maximum contrast with the rosy tone of Sedna Gold, or pearl grey vegetable calf for a sophisticated monochromatic pairing. Alternatively, a fine-grained black rubber strap maintains the modernity of the 8700 movement without visually competing with the mother-of-pearl dial.

Strap replacement requires a specific tool (spring bar tool) to remove the spring bars from the lugs. Place the watch on a soft pad, locate the small holes on the lugs (where the spring bars reside), insert the tool from below to push the spring bar out of its seat, remove the old strap, insert the spring bars of the new strap and verify the safety click. This operation is recommended every 3-4 years for natural wear on the spring bars.

Yes. Quality 18mm straps can be sourced online from brands specialising in compatible straps. However, to maximise longevity and comfort, we recommend straps made with artisanal finishes (vegetable tanning, alligator) and calibrated thickness (1.4-1.6mm) to fit perfectly onto Omega lugs without play. Certification of compatibility with Omega lugs is a guarantee of construction precision.

A medium-quality vegetable calf strap typically lasts 3-5 years with daily wear, while alligator or shell cordovan straps can last 7-10 years. Lifespan depends on frequency of wear, exposure to moisture and periodic maintenance treatment (cleaning with a dry cloth, occasional conditioning with natural wax). Rubber and NATO fabric straps exceed 10 years of use without significant degradation.