Strap for Chronomat 40 GMT Stainless Steel / Ice Blue

The lug width of the Breitling Chronomat 40 GMT P32398101C1S1 is 20 mm. This measurement should be taken between the case lugs using a millimetre ruler, at the point where the strap attaches, excluding the lateral walls of the case.

Given the platinum and stainless steel case of the Chronomat 40 GMT, a vegetable-tanned alligator strap is the most coherent choice in terms of material quality. Box-calf leather offers a more urban aesthetic, whilst a technical NATO or vulcanised rubber strap suits more active or casual wear.

The strap can be removed using a fine-tipped or flat spring bar tool inserted into the spring bar channel between the lugs and the strap. It is advisable to work on a soft surface to protect the platinum and stainless steel case from scratches. The operation is straightforward without specialist tools, provided care is taken around the lug curvature.

Yes. The standard 20 mm lug width makes the Chronomat 40 GMT compatible with a wide range of aftermarket straps. Milanostraps.it offers handcrafted straps in various leathers and finishes, manufactured to tolerances verified against this case family, including versions with pin buckles and deployant clasps.

Longevity depends on the material and frequency of use. A vegetable-tanned alligator strap, with regular conditioning (leather cream every 3–4 months and protection from prolonged moisture), typically lasts between 3 and 6 years. Box-calf has a comparable lifespan, whilst shell cordovan offers superior resistance to abrasion and repeated flexing.