Strap for Chronomat Automatic 36 Stainless Steel - Diamond / White / Rouleaux

The Breitling Chronomat 36 A10380591A1A1 features a 20mm lug width. This measurement refers to the internal distance between the two lugs of the case, taken at the caseback with a millimetre calliper. It is the essential specification for selecting a perfectly compatible aftermarket strap.

For the Chronomat 36 A10380591A1A1, vegetable-tanned alligator is the reference choice for formal settings, owing to its rounded grain and three-dimensional texture. Smooth calf leather develops an elegant patina over time, whilst vulcanised rubber is ideal for daily sporting use. A NATO nylon strap honours the model's aeronautical heritage. The optimal choice depends on intended use and personal aesthetic.

Strap replacement on the Chronomat 36 requires a fine-tipped springbar tool to release the spring bars seated between the lugs. It is advisable to work on a soft surface to protect the case and bezel from scratches. If in doubt, entrust the operation to a qualified watchmaker or to the Casati Milano atelier to avoid any damage to the steel surfaces.

Yes. Standard 20mm aftermarket straps are fully compatible with the Breitling Chronomat 36 A10380591A1A1. It is important to verify that the strap ends are shaped — curved or straight — to match the case profile. Milano Straps offers a curated selection of handcrafted 20mm straps available online, with bespoke options through Casati Milano.

The lifespan of a leather strap depends on the hide, the tanning process, and daily wear conditions. A quality vegetable-tanned alligator strap can last between 3 and 6 years with proper care — avoiding prolonged exposure to water and perspiration. Calf leather typically lasts 2 to 4 years. Shell cordovan, owing to its dense fibre structure, is the most durable among smooth leathers. Milano Straps provides an 18-month guarantee against manufacturing defects.