Strap for Chronomat 44 Stainless Steel / Sierra Silver Roman / Bracelet

The lug width of the Breitling Chronomat B01 44 (ref. AB011012.G676.375A) is 22 mm. This measurement is taken between the two lugs at the point where the strap attaches to the case, using a calliper for an accurate reading.

The most suitable materials for the Chronomat B01 44 are hornback alligator leather for a high-end sartorial aesthetic, vegetable-tanned Tuscan calfskin for those who value the natural patina that develops over time, and nylon NATO straps to honour the model's aeronautical heritage. The ideal choice depends on intended use and the desired chromatic combination.

The strap is removed using a fine-tipped spring bar tool inserted into the dedicated hole on the lug or into the channel between lug and strap. Compress the spring bar, slide the strap free, then fit the new strap by seating one end of the spring bar in the lug first, compressing it and engaging the opposite lug. The standard spring bar diameter for 22 mm lugs is 1.8 mm. Work on a soft surface to avoid scratching the bezel.

Yes. The standard 22 mm lug width of the Chronomat B01 44 is compatible with a wide range of quality aftermarket straps. Milano Straps offers handcrafted straps in alligator, vegetable-tanned calfskin, shell cordovan and rubber, all produced with standard 22/20 mm or 22/18 mm spring bars depending on the chosen buckle. The straight lug geometry of the Chronomat further simplifies compatibility.

The lifespan of a leather strap depends on the quality of the hide, frequency of wear and exposure to perspiration and the elements. A mid-grade calfskin strap averages 12–18 months with daily use. A high-quality alligator or vegetable-tanned strap, properly maintained with conditioning cream every two to three months and kept away from heavy rain, can exceed three to five years while retaining structural and aesthetic integrity. Milano Straps provides an 18-month warranty against manufacturing defects.