Strap for Chronomat B01 42 Six Nations / Wales

The lug width of the Breitling Chronomat B01 42 AB0134A61K1A1 is 22mm. This measurement refers to the internal gap between the case lugs and is essential for selecting a compatible strap. To verify this on your own watch, use a calliper to measure the distance between the two lugs, inserting it between the case and the original bracelet.

The choice depends on usage and the desired aesthetic register. For a sporty-casual context, a vegetable-tanned calfskin strap with a perforated grain — such as the Rally Heritage — complements the watch's aeronautical character. For formal wear, lacquered alligator in black or navy is the most refined option. FKM rubber is preferable for aquatic activities, whilst a ballistic nylon NATO strap accentuates the tool-watch heritage of the model.

To replace the strap, a spring bar tool is required — a double-ended instrument that allows the spring bars housed within the case lugs to be compressed. Insert the fine tip into the small gap between the lug and the strap, compress the spring bar, and slide the strap outward. The operation takes only a few minutes and does not require professional equipment, though it is advisable to work on a soft surface to avoid scratching the case.

Yes, all straps with a 22mm attachment are compatible with the Chronomat B01 42. Milano Straps offers a selection of handcrafted straps in 22mm made from selected Italian leathers, available in various finishes — calf, alligator, shell cordovan and rubber. For those who prefer a fully bespoke option, Casati Milano provides a made-to-measure service by appointment at the Milan atelier.

The lifespan of a leather strap depends on the type of leather, care and frequency of use. A quality vegetable-tanned calfskin strap, with regular maintenance — applying nourishing cream every 2–3 months and protecting it from excess moisture — can last between 2 and 5 years with daily wear. Alligator and shell cordovan, owing to their more compact fibre structure, tend to last longer while retaining their original shape. Milano Straps guarantees its straps for 18 months against manufacturing defects.