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

The Breitling Chronomat 36 reference U10380591A1U1 features an 18mm lug width. This is the critical measurement to confirm before purchasing any aftermarket strap: measure the internal distance between the two upper lugs with a millimetre ruler to verify the 18mm figure.

For the Chronomat 36 in steel and red gold, alligator straps with a smooth grain finish (cognac, honey or midnight blue) and vegetable-tanned calfskin are the most balanced choices. Cognac leather creates tonal continuity with the red gold; midnight blue produces a refined chromatic contrast. Shell cordovan is the premium option for those seeking exceptional longevity and a distinctive texture.

The strap on the Chronomat 36 is replaced using a fine-tipped spring bar tool. Insert the tip into the lateral groove of the lug, compress the spring bar and slide it outward. Care should be taken to avoid scratching the case: it is advisable to protect the surfaces with a soft cloth or low-tack tape before proceeding.

Yes. Any strap with an 18mm lug width is technically compatible with the Chronomat 36 U10380591A1U1. Milano Straps offers a selection of handcrafted 18mm straps in various materials — alligator, calfskin, shell cordovan, vulcanised rubber — all made with keepers and buckles proportioned to the 36mm case.

The lifespan of a leather strap depends on the material and frequency of daily use. A vegetable-tanned calfskin strap worn regularly typically lasts 18 to 24 months before showing significant wear at the adjustment holes. Shell cordovan and quality alligator, owing to their denser fibre structure, can exceed 3 to 4 years with periodic conditioning. Casati Milano straps carry an 18-month guarantee against manufacturing defects.