Strap for Chronomat B01 42 NFL Cincinnati Bengals / Rouleaux

The lug width of the Breitling Chronomat B01 42 AB01342B1O1A1 is 22mm. This measurement should be taken with a calliper at the inner section of the lugs, directly against the case, and must read exactly 22mm to ensure a proper strap fit without lateral play.

The most suitable options for the Chronomat B01 42 are: vegetable-tanned calf leather for everyday wear with natural patina development; matte alligator for formal settings, complementing the satin-brushed case finish; shell cordovan for longevity and a slim profile; vulcanised rubber for sport and water use. A 22mm steel deployant clasp is recommended for visual symmetry with the lugs.

To replace the strap on the Chronomat B01 42, you will need a spring bar tool (flat-headed fork lever). The lugs are solid and slightly curved: insert the tool into the lateral slot of the lug, compress the spring bar and slide the strap out. It is advisable to work on a soft surface to protect the case from scratches. A 22mm wide strap is the correct replacement size.

Yes, the aftermarket offers a wide selection of straps compatible with the Breitling Chronomat B01 42, provided they respect the 22mm lug width and feature a straight (non-domed) end to fit correctly against the curved lugs of this model. Milano Straps crafts bespoke handmade straps specifically compatible with this reference, available in various materials and finishes.

The lifespan of a leather strap depends on hide quality, care and usage. A quality vegetable-tanned calf strap, worn daily and maintained regularly (conditioning cream every 2–3 months, kept away from water), typically lasts 2–4 years. Shell cordovan may exceed 5 years thanks to its dense fibre structure. Alligator, when properly cared for, offers comparable longevity. Milano Straps products carry an 18-month warranty against manufacturing defects.