Strap for Constellation Quartz 35 Perpetual Calendar Stainless Steel / Black

The lug width of the 1511.51.00 is 16mm. This means the strap must be exactly 16mm wide at the ends to fit perfectly onto the case attachment pins. Always measure with a digital caliper positioned perpendicularly to the pins, from the inner point of one bar to the other.

For the 1511.51.00 we recommend alligator or shell cordovan thanks to their elevated aesthetic character and ability to age elegantly over time. If you prefer everyday versatility, vegetable-tanned calf leather is the ideal choice: it maintains visible texture, resists wear and develops a natural patina over time. For casual use, specialized rubber offers practicality without aesthetic compromise.

Strap replacement requires removal of the spring bars. Position the watch on a soft surface, use a dedicated spring bar tool or a small flathead screwdriver, and push the pin inward to release the old strap. Insert the new 16mm strap by aligning the holes and resecure the pin until it locks naturally. If you lack confidence, entrust the work to a certified professional.

Yes, any strap with a 16mm lug width is compatible with the 1511.51.00, regardless of manufacturer. However, we recommend straps made with superior quality leather (alligator, shell cordovan, vegetable-tanned calf) to respect the aesthetic and construction standard of an Omega watch. Verify that the strap's spring bars insert securely into the case holes.

A premium leather strap (alligator, shell cordovan, calf) worn daily has a lifespan of 3-5 years before requiring replacement or reconditioning. Longevity depends on humidity, frequency of use and maintenance: regular drying and periodic conditioning with specific balms significantly extend useful life. Casati Milano straps include an 18-month warranty and are designed to sustain multiple years of wear with appropriate care.