Strap for Colt 36 Pearl Diamond / Calf / Pin

The lug width of the Breitling Colt A7438911/A771/414X/A16BA.1 is 18mm. This measurement should be taken at the point where the strap attaches between the lugs, using a calliper or a millimetre ruler, rather than from the original strap already mounted, which may have deformed over time.

For the Breitling Colt 36mm with an 18mm lug width, vegetable-tanned calf leather in a smooth or cross-grain finish is the most versatile option, developing an authentic patina with wear. Bombé alligator suits formal occasions, NATO nylon is ideal for daily or summer use, and vulcanised rubber is the technically correct solution for sporting and aquatic activities, given the watch's 200-metre water resistance rating.

Strap replacement requires a fine-tipped spring bar tool or a flat-head screwdriver. The spring bars must be compressed laterally to release the strap from the lugs. Care should be taken to avoid scratching the stainless steel case; placing a soft cloth between the tool and the case is strongly advisable. Any standard 18mm strap fits without adapters.

Yes, any strap with an 18mm attachment fits the Breitling Colt A7438911/A771/414X/A16BA.1. Milanostraps.it offers a curated selection of handcrafted straps in various materials — alligator, calf leather, shell cordovan, rubber, and NATO — all produced with a standard 18mm attachment, requiring no adapters or case modifications.

The lifespan of a leather strap depends on the quality of the tanning process, frequency of use, and exposure to water and perspiration. A quality vegetable-tanned calf leather strap, with daily use and periodic conditioning, typically lasts between 2 and 4 years. Casati Milano straps carry an 18-month warranty against manufacturing defects. For a Colt rated to 200 metres, it is advisable to alternate the leather strap with a rubber one during aquatic activities.