Strap for Chronomat B01 Chronograph 44 Stainless Steel / Blackeye Blue / Croco / Folding

The lug width of the Breitling Chronomat B01 44 is 22 mm. This measurement is consistent across the entire Chronomat 44 range regardless of reference or case material. To verify, use a digital calliper to measure the inner distance between the two lugs at the lower part of the case.

For the Chronomat B01 44, the most suitable options include cross-grain calf leather for versatile everyday use, or alligator for formal occasions. Shell cordovan provides a compact texture that develops a rich patina over time. Vulcanised rubber is preferable in sporting or marine contexts, whilst a NATO nylon strap reinforces the model's aeronautical heritage. The correct attachment width is 22 mm throughout.

To replace the strap on the Chronomat B01 44, use a dedicated spring bar tool or a fine-tipped flat instrument. Insert the tool into the groove of the spring bar within the lug, compress the spring bar and slide the strap out. Take care not to scratch the steel case during the process. It is advisable to rest the watch on a soft cloth. A watchmaker or the Casati Milano atelier can perform the fitting in a matter of minutes.

Yes. Any strap with a 22 mm attachment width and a standard spring bar is compatible with the Chronomat B01 44. Milano Straps offers a curated selection of Italian handcrafted 22 mm straps in various materials — calf leather, alligator, shell cordovan, rubber and NATO — all manufactured to precise dimensions ensuring a correct fit within the original Breitling lugs.

The longevity of a leather strap depends on hide quality, tanning method and daily usage. A high-quality vegetable-tanned strap, properly maintained — avoiding prolonged exposure to water and perspiration, and applying leather conditioner periodically — can last between two and five years. Shell cordovan and alligator generally have longer service lives than standard calf leather. Milano Straps straps carry an 18-month guarantee against manufacturing defects.