Strap for Chronomat B01 42 Red Gold / Anthracite / Rouleaux

The lug width of the Breitling Chronomat B01 42 RB0134101B1R1 is 22 mm. This measurement refers to the internal distance between the lugs at the base of the case, where the strap or bracelet is fitted. It is advisable to verify this with a digital calliper before ordering a replacement strap to ensure a precise fit.

For an 18-carat Red Gold case such as that of the Chronomat B01 42, a vegetable-tanned alligator strap is the most coherent choice: the natural grain develops a patina that complements the warmth of the precious metal. Shell cordovan is a refined alternative with a compact texture. For more active use, an anatomical rubber strap offers comfort and moisture resistance without compromising aesthetics.

The strap is removed using a springbar tool — a lever instrument with a fine tip — which acts on the spring bars inserted between the lugs. Compress the spring bar on both sides to release the strap. Care should be taken not to scratch the Red Gold lugs; it is advisable to protect the case with masking tape or to entrust the operation to a qualified watchmaker.

Yes, any strap with a standard 22 mm attachment is technically compatible with the Breitling Chronomat B01 42. However, the geometry of the integrated lugs and the mass of the case call for a strap with a shaped end profile — curved or straight, according to the lug design — to ensure a correct fit and a coherent aesthetic result. Milano Straps offers handcrafted straps made specifically for this lug width.

The lifespan of a leather strap depends on material quality and maintenance. A high-quality alligator or shell cordovan strap, vegetable-tanned and hand-finished, can last between three and seven years with regular use. It is essential to avoid prolonged contact with water and perspiration, to dry the strap after use, and to apply a suitable leather conditioner occasionally. Casati Milano straps carry an 18-month guarantee against manufacturing defects.