Strap for Constellation Co-Axial 35.5 Stainless Steel / Red Gold / Silver / 160 Years

The Omega Constellation 111.20.36.20.52.001 has a lug width of 18mm. This width is specific to the 35mm case model and is determined by the distance between the two lugs at the bottom of the case. To verify the compatibility of an aftermarket strap, use a digital caliper to measure the space between the lugs: the measurement must correspond exactly to 18mm.

The ideal strap depends on usage and aesthetic preferences. For the premium positioning of this model, alligator in dark brown or cognac tones represents the most coherent choice, enhancing the red gold case. Calf leather offers a finer grain and superior malleability, perfect for those seeking an immediately comfortable strap. Shell cordovan is appreciated by European connoisseurs for its natural lustre. For more versatile contexts, rubber or NATO fabric represent contemporary alternatives without compromising the overall aesthetic.

To change the strap, obtain a spring bar tool (a specific tool for the lug springs). Remove the old strap by inserting the tool into one of the lateral holes of the lug, depressing the internal spring, then extract the strap. Repeat for the opposite lug. Insert the new 18mm strap aligning it correctly with the holes, ensuring that the spring clicks into position with a crisp sound. Verify that the strap is securely fastened before wearing the watch.

Yes, provided they respect the 18mm lug width. Aftermarket straps of artisanal quality (such as those made by Milano Straps) are fully compatible and often offer superior build quality compared to OEM straps. Always verify the lug width (18mm) and strap thickness: the Constellation's lugs have a depth of approximately 2.8-3mm, so straps with thickness up to 4.5mm fit correctly.

Durability depends on the material and wearing conditions. Artisanal alligator of superior quality, with appropriate maintenance (regular cleaning and drying after moisture exposure), lasts 3-5 years. Calf leather, being softer, has a slightly shorter lifespan: 2.5-4 years. Shell cordovan, thanks to its natural density, can last up to 6-7 years. The 18-month warranty offered by specialized ateliers such as Casati Milano covers manufacturing defects; natural leather wear is not covered but represents part of the charm of the piece, developing a personal patina over time.