Strap for Chronomat B01 42 Red Gold - Diamond / Silver / Rubber

The lug width of the Breitling Chronomat B01 42 RB0134721G1S1 is 22mm. This measurement is standard across the entire Chronomat B01 42 family and should be taken with a digital calliper inside the lugs, at the narrowest point where the strap seats.

For an 18k Red Gold case, the most coherent choice is a vegetable-tanned alligator strap in cognac, tobacco or burgundy. The scale texture complements the warmth of red gold and develops an authentic patina over time. Box calf and shell cordovan offer equally refined alternatives at different registers. For sporting use, vulcanised rubber remains functionally correct.

The strap on the Chronomat B01 42 is secured by standard 22mm spring bars. A fine-tipped spring bar tool or a strap-change knife inserted into the spring bar slot compresses the spring and releases the strap from the lug. No specialist skills are required, but it is advisable to work on a soft surface to avoid scratching the red gold case.

Yes. Any strap with a 22mm attachment width and straight-end geometry is compatible with the Chronomat B01 42 RB0134721G1S1. Milano Straps offers a curated selection of handcrafted straps in alligator, calf leather, NATO webbing and rubber, all sized specifically for this lug width. For optimal fit, the total strap length should also be verified against the wearer's wrist circumference.

The lifespan of a leather strap depends on the material, tannage and frequency of wear. A quality vegetable-tanned alligator strap, with ordinary care, typically lasts 3–5 years before the buckle hole or inner lining shows significant wear. Calf leather has a similar lifespan but is more sensitive to moisture. Regular maintenance — a conditioning cream every 3–4 months and rotation between multiple straps — extends longevity considerably.