Strap for Chronomat 44 Stainless Steel / Rose Gold / Metallica Blue / Croco / Folding

The lug width of the Breitling Chronomat B01 44 CB0110121C1P2 is 22 mm. This measurement should be taken with a calliper gauge inside the lugs, flush against the case, where the gap between the lugs is at its widest and corresponds to the standard spring bar housing.

For the Chronomat B01 44 in steel and rose gold, the most suitable materials are vegetable-tanned calfskin in cognac or tobacco tones — which complement the rose gold components — or a belly alligator strap with symmetrical scales for formal occasions. For sport use, vulcanised rubber maintains waterproofness and suits the model's aviation heritage. The lug width is 22 mm.

To replace the strap on the Chronomat B01 44, remove the spring bars from the lugs using a bifurcated spring bar tool. Work on a soft surface to avoid scratching the case. Standard 22 mm spring bars are compatible with Milano Straps aftermarket straps. The operation can be carried out independently or by a watchmaker.

Yes. Aftermarket straps with straight 22 mm ends are compatible with the Breitling Chronomat B01 44, including reference CB0110121C1P2. Milano Straps offers a selection in calfskin, alligator, shell cordovan and NATO, all handcrafted and available with a buckle or deployant clasp, at a taper of 22/20 mm or 22/18 mm depending on aesthetic preference.

The lifespan of a leather strap depends on frequency of use, exposure to perspiration and water, and the quality of the leather. A high-quality vegetable-tanned calfskin strap, with moderate daily wear and proper care (periodic conditioning with a neutral cream), will typically last 2–4 years. Alligator and shell cordovan, owing to their denser fibre structure, tend to last longer and develop a distinguished patina over time.