Strap for Chronomat 44 GMT Stainless Steel / Metallica Blue / Croco

The lug width of the Breitling Chronomat B01 44, reference AB042011.C851.731P, is 22mm. This measurement is taken with a calliper across the inner distance between the two lugs of the case. Any 22mm strap is compatible with this reference.

The most suitable materials for the Chronomat B01 44 are perforated Italian calfskin in rally style — which complements the chronograph's sporting character — and vegetable-tanned alligator for more formal pairings. Vulcanised rubber is also an excellent option for nautical or intensive sports use, given the water resistance of the B04 calibre.

The strap on the Chronomat B01 44 is replaced using a spring bar tool to remove the spring bars securing the strap to the lugs. The Chronomat's lugs are substantial in size: a fine-tipped spring bar tool is recommended to work with precision and avoid scratching the stainless steel case. The operation takes approximately two minutes and requires no specialist equipment.

Yes. The Chronomat B01 44 uses standard 22mm lugs, making it compatible with any aftermarket 22mm strap fitted with spring bars. Milano Straps manufactures handcrafted Italian leather straps specifically proportioned for this reference, with straight or slightly tapered ends to follow the curve of the Breitling lugs.

The lifespan of a leather strap depends on the quality of the hide, frequency of use, and exposure to moisture and perspiration. A first-quality alligator or vegetable-tanned calfskin strap, with proper care, will last between two and four years of regular wear. Milano Straps straps carry an 18-month warranty against manufacturing defects.