Strap for Chronomat B01 Chronograph 44 Stainless Steel / Blackeye Grey / Bracelet

The lug width of the Breitling Chronomat B01 44 AB0115101F1A1 is 20 mm. This measurement is taken between the lower lugs of the case using a digital calliper, at the narrowest point of the lug gap. All straps compatible with this reference must feature a 20 mm attachment end.

For the Chronomat B01 44 AB0115101F1A1, the ideal choice depends on the intended use. A belly-cut alligator strap in vegetable-tanned leather pairs exceptionally well with the 44 mm steel case in formal settings. For sport or outdoor use, a vulcanised rubber strap or a nylon NATO maintains the tool-watch character of the model. Shell cordovan is recommended for those who appreciate a slow, deep patina developing over time.

To replace the strap on the Chronomat B01 44, the spring bars connecting the strap or bracelet to the case lugs must be removed. Use a spring bar tool — a double-ended pin pusher — inserted into the lug hole to compress and release the bar. It is advisable to work on a soft surface to protect the case, and to use a tool with nylon tips or a silicone-coated head to avoid scratching the lugs.

Yes. The Breitling Chronomat B01 44 AB0115101F1A1 features a standard 20 mm lug width, ensuring full compatibility with the entire range of aftermarket straps at that size. Milano Straps offers handcrafted straps in alligator, shell cordovan, calf leather and rubber, all produced with a 20 mm attachment and available with a straight buckle or deployant clasp in stainless steel.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily usage. A quality alligator or shell cordovan strap in vegetable-tanned leather, with ordinary care — regular rotation and limited exposure to water — can last between 3 and 6 years. Casati Milano straps carry an 18-month guarantee against manufacturing defects.