Strap for Chronomat 44 Stainless Steel / Black MOP - Roman / Japan Special Edition

The lug width of the Breitling Chronomat B01 44, reference AB01153A1B1A1, is 22mm. This measurement is standard across the current Chronomat 44 generation and should be confirmed with a digital calliper between the case lugs before purchasing an aftermarket strap.

The choice depends on intended use. For formal or business settings, a vegetable-tanned alligator strap with porosus or hornback grain offers the most refined result. For daily wear, a padded box-calf leather strap develops an attractive patina over time. For sport or outdoor activities, a vulcanised rubber strap with a racing profile is the most practical option. All choices must have a 22mm lug width.

Replacing the strap on the Chronomat B01 44 requires a fine-tipped spring bar tool. Insert the tool into the side hole of the lug or into the spring bar seat, compress the spring bar, and slide the strap free. The operation takes approximately two minutes per side and requires no specialist watchmaking skills. It is advisable to work on a soft surface to avoid scratching the stainless steel case.

Yes. Any strap with a 22mm lug width and standard length (120mm/80mm for size M or 125mm/75mm for size L) is compatible with reference AB01153A1B1A1. It is important to check that the upper taper of the strap is compatible with the slightly curved lugs of the Chronomat. Milano Straps offers a selection of handcrafted 22mm straps specifically tested on this model.

Longevity depends on leather type, frequency of use, and conditions. A quality vegetable-tanned calf leather strap, with standard care (kept away from water and chemicals), typically lasts between two and four years. A first-grade alligator strap can exceed five years. Prolonged exposure to rain or perspiration is the primary cause of deterioration: in such conditions it is advisable to alternate with a rubber or NATO strap.