Strap for Chronomat 44 GMT Stainless Steel / Rose Gold / Metallica Brown / Bracelet

The lug width of the Breitling Chronomat B01 44 CB042012.Q590.375C is 22 mm. This measurement is taken with a digital calliper positioned between the two lugs at the narrowest point, where the spring bars are seated. It is a standard size for large-diameter sports chronographs and compatible with a wide range of aftermarket straps.

For the two-tone rose gold and steel version of the CB042012.Q590.375C, the most fitting straps are Hornback alligator in chocolate brown or dark tobacco, or vegetable-tanned calf leather in cognac, which develops a patina that harmonises with the rose gold over time. For a more sporting aesthetic, vulcanised rubber in dark anthracite preserves the instrument chronograph character. All available in 22 mm lug width at Milano Straps.

To replace the strap on the Breitling Chronomat B01 44, the spring bars connecting the strap to the case lugs must be removed. Use a fine-tipped spring bar tool inserted into the small notch on the side of each lug to compress the pin. Work on a soft surface to avoid scratching the two-tone case. The lug width is 22 mm — always verify this measurement before purchasing any aftermarket strap.

Yes. Any strap with a 22 mm lug width is technically compatible with the Breitling Chronomat B01 44 CB042012.Q590.375C. Milano Straps produces handcrafted 22 mm straps in alligator, vegetable-tanned calf leather, shell cordovan and technical materials, with lugs finished to the millimetre for a precise fit. An aftermarket deployant clasp in steel or rose gold PVD can also be paired to replicate the original closing mechanism.

The lifespan of a leather strap depends primarily on the quality of the tanning process and daily use. A high-quality vegetable-tanned calf strap, worn with care and rotated with other straps, can last three to five years while keeping its stitching and structure intact. Alligator or shell cordovan straps, due to the density of their fibres, offer superior durability and develop a characteristic patina over time. Milano Straps provides an 18-month guarantee against manufacturing defects on all its straps.