Strap for Chronomat 44 Stainless Steel / Blue / Croco

The lug width of the Breitling Chronomat B01 44 AB011012.C788.731P is 22mm. This measurement is taken between the two inner horns of the case using a digital calliper or a millimetre ruler. It is essential to respect this dimension to ensure a correct and secure fit for any replacement strap.

The most suitable straps for the Chronomat B01 44 include perforated leather rally straps for a sporting look, vegetable-tanned calf leather for everyday elegance, and matte alligator for formal occasions. Rubber straps with relief texture or nylon NATO straps are ideal for aquatic or high-activity environments. The correct lug width is 22mm.

To replace the strap on the Chronomat B01 44, remove the spring bars connecting the strap to the case lugs using a springbar tool — insert the tip into the lug hole or between the lug and strap to compress the bar and release it. Work on a soft surface to avoid scratching the case. Insert the new 22mm strap by reversing the procedure.

Yes, a wide range of aftermarket straps are compatible with the Chronomat B01 44, provided they respect the 22mm lug width. Milano Straps crafts handmade straps in Italian leather, alligator, calf and other materials, with shaped ends to match the curved Breitling lugs. The quality of materials and hand-finishing ensure superior fit and longevity compared to the standard strap.

The lifespan of a leather strap depends on the material, care and intensity of use. A good-quality vegetable-tanned calf strap, kept away from water and perspiration, can last between two and four years. Alligator leather, with its denser fibre structure, tends to age better over time. Daily use in humid or sporting environments will significantly shorten its life — in such cases, rubber or NATO straps are more practical. Milano Straps provides an 18-month guarantee against manufacturing defects.