Strap for Breitling Chronomat Automatic GMT 40 NFL Indianapolis Colts Edition

The lug width of the Breitling Chronomat 40 GMT A32398D51C1A1 is 20 mm. This is a standard measurement that ensures broad compatibility with quality aftermarket straps in leather, rubber, or NATO nylon.

The most suitable strap depends on the intended use. For formal or semi-formal occasions, a vegetable-tanned alligator strap with a matte finish complements the technical-elegant character of the Chronomat 40 GMT. For sport or travel, a NATO nylon strap or vulcanised rubber strap are functional choices that align with the model's aviation heritage.

The strap is removed using a springbar tool to release the spring bars seated in the 20 mm lugs. It is advisable to place a soft cloth beneath the case to avoid scratching the stainless steel. If in doubt, entrust the operation to a watchmaker or to the Casati Milano atelier.

Yes, any strap with a 20 mm attachment and straight or slightly tapered end is compatible. Milanostraps.it offers a curated selection of 20 mm straps in leather, rubber, and NATO weave designed for Breitling Chronomat models, with bespoke customisation available through the Casati Milano atelier.

The lifespan of a leather strap depends on the hide quality, the tanning method, and daily wear conditions. A high-quality alligator or shell cordovan strap, properly maintained — kept away from prolonged moisture and occasionally nourished with leather cream — can last between 2 and 5 years while developing an attractive patina. Casati Milano straps carry an 18-month warranty against manufacturing defects.