Strap for Chronomat 44 GMT Stainless Steel / Rose Gold / Pearl / Rubber

The lug width of the Breitling Chronomat B01 44 CB042012.A739.211S is 22 mm, measured internally between the two lugs at the point of contact with the case. It is advisable to use a flat-jaw digital calliper to obtain an accurate reading, as the lug angle can otherwise introduce measurement errors.

For the Chronomat B01 44 CB042012.A739.211S, with its two-tone rose gold and steel case and mother-of-pearl dial, the most appropriate straps are vegetable-tanned alligator belly in cognac, burgundy or terracotta. The symmetric grain of the alligator belly complements the geometry of the rider-tab bezel, while the natural patina that develops over time harmonises with the rose gold details. Shell cordovan or smooth calf in navy blue offer equally coherent alternatives with a different character.

The strap on the Breitling Chronomat B01 44 is replaced using a spring bar tool with a fine tip. Insert the tip into the lateral notch of the lug, compress the spring bar and slide the strap free. Repeat on the opposite side. For fitting, insert one end of the spring bar into the lug, compress the other end and click it into place. It is recommended to work on a padded surface to protect the case finish.

Yes, a wide range of aftermarket straps is available to fit the 22 mm lug width of the Chronomat B01 44. Milanostraps.it offers a curated selection of handcrafted straps in alligator, calf, shell cordovan and rubber, all produced with standard 22 mm spring bars. For models originally fitted with an integrated bracelet, it is worth confirming that the lugs do not feature proprietary threading.

The longevity of a leather strap depends on the material and conditions of use. A handcrafted vegetable-tanned alligator strap, properly maintained — avoiding prolonged exposure to perspiration and water, and applying a leather conditioner every two to three months — will typically last three to five years. Shell cordovan, owing to its dense, compact structure, generally outlasts other leathers. Casati Milano straps carry an 18-month warranty against manufacturing defects.