Strap for Chronomat 44 Stainless Steel / Blue / Bracelet

The lug width of the Breitling Chronomat B01 44, reference AB011011/C789/375A, is 22mm. It should be measured using a digital calliper positioned internally between the two lugs, at the narrowest point closest to the case — not at the outer tip. All compatible straps must have a 22mm strap width tapering to 20mm at the buckle end, in accordance with standard industry practice.

The most suitable materials for the Chronomat B01 44 are belly alligator leather (symmetrical grain, formal register), vegetable-tanned Tuscan calf leather (natural patina, everyday wear) and vulcanised rubber for sporting or marine environments. The ideal choice depends on intended use and the dial's colour palette. A steel deployant clasp paired with any leather strap improves wrist stability and overall finishing quality.

The strap on the Chronomat B01 44 is secured by standard 1.8mm spring bars housed within the lugs. A fine-tipped spring bar tool is sufficient: insert it into the lug slot, compress the spring bar and slide the strap free. No specialist equipment is required, though care should be taken to avoid scratching the case. It is advisable to work on a soft surface to protect both the watch and the new strap during fitting.

Yes, the aftermarket offers extensive compatibility for the 22mm lug width of the Chronomat B01 44. Milano Straps produces handcrafted straps in leather, rubber and nylon with a 22mm strap end tapering to 20mm, fitting without modification via standard spring bars. The quality of materials and artisan finishing is comparable — and in some cases superior — to original accessories, with bespoke customisation available.

Strap longevity depends on material, tanning process and frequency of use. A quality vegetable-tanned calf strap, maintained with leather conditioner every two to three months and kept away from direct heat, typically lasts two to four years under daily wear. A hand-finished alligator strap, owing to the dense fibrous structure of its scales, can exceed five years of regular use. Milano Straps provides an 18-month warranty against manufacturing defects on all catalogue straps.