Breitling
Colt A7438953.G803.412X— lug 18mm

The Breitling Colt A7438953.G803.412X has a lug width of 18mm, measured as the internal gap between the case lugs. This is the key specification when selecting a compatible replacement strap and should be verified with a digital calliper for accuracy.

For the Colt 36mm in stainless steel, the most appropriate materials are vegetable-tanned calf leather for everyday use, smooth alligator for formal pairings, and vulcanised rubber or woven nylon NATO for sporting contexts. A steel deployant clasp ensures consistent metal pairing with the case.

Strap replacement is carried out by removing the spring bars securing the strap to the 18mm lugs using a spring bar tool or fork-type tool. The process takes approximately five minutes and does not require opening the case or removing the case back.

Yes: any strap with an 18mm attachment width and standard spring bars is compatible. Milano Straps produces handcrafted straps specifically for 18mm lug widths, available online or made to measure at the Casati Milano atelier, where clients may select materials in person.

A quality leather strap — vegetable-tanned calf or alligator — fitted to a Colt 36mm typically lasts between two and four years with regular wear, depending on perspiration, humidity exposure and maintenance. Applying a leather conditioner every three to four months significantly extends the strap's life and preserves flexibility at the keeper.