Strap for Chronomat Automatic 36 Stainless Steel / Green / Rouleaux

The Breitling Chronomat 36 A10380101L1A1 has a lug width of 18mm. This measurement should be taken with a digital calliper placed internally between the two lugs, perpendicular to the caseback axis. It is the essential figure for selecting any compatible aftermarket strap.

For the Chronomat 36 in stainless steel, the most suitable straps are: wide-grain alligator for a formal look with texture consistent with the bezel, vegetable-tanned calf leather for those seeking a natural patina, shell cordovan for everyday urban wear, and nylon NATO for sporting use. Strap ends should be curved to match the geometry of the integrated Rouleaux bracelet lugs.

The Chronomat 36 uses standard 18mm spring bars. To replace the strap, use a spring bar tool or fork-type screwdriver to release the bars from the lugs, remove the existing bracelet or strap, and fit the new one with replacement spring bars. It is advisable to work on a soft surface to protect the case. Alternatively, any watchmaker or the Casati Milano atelier can perform the operation safely.

Yes, there are many compatible aftermarket straps in 18mm. It is essential to choose straps with curved ends to correctly fit the lug geometry of the Chronomat 36, avoiding gaps between the case and strap. Milano Straps offers a selection of handcrafted 18mm straps specifically made with ends suited to this watch family.

The lifespan of a leather strap depends on the material and level of use. A quality vegetable-tanned calf strap, with daily wear, typically lasts 18–24 months before replacement is needed. Shell cordovan, thanks to its dense structure, can exceed 3 years. Alligator, when maintained with neutral products and kept away from prolonged moisture, retains its shape and colour for 2–4 years. Casati Milano straps carry an 18-month warranty against manufacturing defects.