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

The lug width of the Constellation 131.53.29.20.52.002 is 18mm. This width is specific to the 29mm women's model and is incompatible with 17mm or 19mm lug widths. The measurement should be taken at the widest point of the bar that passes through the lateral windows of the case, excluding the terminals.

For the Constellation Sedna Gold, straps in alligator, vegetable-tanned calf, or shell cordovan are recommended. Alligator is the most elegant choice thanks to its natural grain texture that harmonizes with rose gold without competing visually. Vegetable-tanned calf offers a more casual aesthetic with a patina that improves over time. Shell cordovan ensures resistance to weathering and develops a deep lustre over the years.

The strap is removed using a spring bar tool to extract the bars that connect the strap to the case lugs. Position the tool under the bar and apply downward pressure until the spring gives way. Once the bar is extracted, the old strap comes free. Insert the new 18mm strap onto the bar and reinsert the bar into the windows, listening for the characteristic "click" that indicates proper seating. If uncertain, contact an authorized Omega retailer or a specialized watchmaker.

Yes, quality aftermarket straps are fully compatible and represent an excellent option. Ensure that the lug width is exactly 18mm and that the leather thickness is proportionate (generally between 4mm and 5mm to avoid play on the bar). Specialized suppliers such as Milanostraps offer 18mm straps tested for Omega compatibility, with the possibility of customization in leather, size, and stitching thread.

The lifespan of a leather strap depends on frequency of use, materials, and atmospheric conditions. A superior quality alligator strap, used daily with ordinary care, typically lasts 5-7 years before showing signs of significant wear. Vegetable-tanned calf has a similar lifespan if protected from excessive moisture. Shell cordovan, being more resistant to weathering, can exceed 10 years of intensive use. Avoid prolonged exposure to excessive moisture, extreme temperatures, and direct sunlight to maximize longevity. Milanostraps guarantees 18 months on straps made to measure in the atelier.