Strap for Chronomat Automatic 36 Stainless Steel / MOP / Rouleaux

The Breitling Chronomat 36 A10380101A4A1 has a lug width of 18mm. This measurement corresponds to the internal distance between the two lugs, taken at the point where they meet the case, using a digital calliper. Respecting this specification is essential to ensure the correct and safe fitting of any aftermarket strap.

For the Breitling Chronomat 36 A10380101A4A1, belly-cut alligator and vegetable-tanned calfskin straps offer the most balanced combination of elegance and durability. Alligator enhances the luxurious character of the stainless steel case, whilst vegetable-tanned calfskin develops a distinctive patina over time. For a more sporting look, a vulcanised rubber strap maintains consistency with the Chronomat's technical aesthetic vocabulary.

To replace the strap on the Breitling Chronomat 36 A10380101A4A1, a fine-tipped spring bar tool is required. The lugs house press-fit spring bars: by inserting the tool into the dedicated lateral slot, the spring bar is compressed and the strap or bracelet is released. Care must be taken not to scratch the case during this process. If in doubt, it is advisable to consult a watchmaker or a specialist atelier such as Casati Milano.

Yes, the Breitling Chronomat 36 A10380101A4A1 uses standard 18mm spring bars, compatible with the wide range of aftermarket straps available in this lug width. It is important to verify that the chosen strap has ends suited to the curvature of the Breitling lugs. A curated selection of compatible 18mm straps, including bespoke artisan options, is available at milanostraps.it.

The lifespan of a leather strap depends on the material, care and frequency of use. A quality calfskin strap, with regular conditioning (leather cream every 3–6 months), typically lasts 2–4 years with daily wear. Alligator or shell cordovan straps, owing to the higher density of their fibres, can exceed 5 years whilst retaining their structure and appearance. Casati Milano straps carry an 18-month guarantee against manufacturing defects.