Strap for Chronomat B01 42 Red Gold / Green / Rouleaux

The Breitling Chronomat B01 42 reference RB0134101L1R1 features a 22mm lug width. This measurement is standard across the Chronomat 42 family and opens up a wide selection of high-quality aftermarket straps.

For a 42mm Red Gold case with a sport-luxury character, an alligator strap in Louisiana or Mississippi grain — in tobacco, cognac or chocolate — offers the finest balance between boldness and refinement. A vegetable-tanned calf leather strap develops a natural patina over time. For more active use, vulcanised rubber is the most technically coherent choice.

The Chronomat B01 42 uses a standard 22mm spring bar system. Use a fine-tipped spring bar tool (0.8mm tip recommended to avoid scratching the rose gold lugs), compress and remove the spring bars, slide out the existing strap and fit the new one, ensuring both spring bars click securely into place. The operation takes 2–3 minutes without specialist tools.

Yes. Any strap with a 22mm attachment and standard spring bars is technically compatible. MilanoStraps crafts bespoke straps in alligator, calf, shell cordovan and fabric, dimensioned specifically for the Chronomat B01 42 lugs, with an optional 18kt rose gold buckle to match the RB0134101L1R1 case.

Longevity depends on the material and frequency of wear. A quality alligator strap with saddle-stitched seams and wax-finished edges will maintain structural integrity for 3–5 years with daily use. A vegetable-tanned calf strap develops character but may show wear at the keeper after 18–24 months of intensive use. Rotating between two straps significantly extends the life of both.