Strap for Breitling Chronomat Automatic GMT 40 NFL Pittsburgh Steelers Edition

The Breitling Chronomat 40 GMT reference A32398B71B1A1 takes a strap with a lug width of 20mm. This measurement is taken internally between the lugs using a calliper and represents the correct size for replacing the original bracelet or strap with an aftermarket option.

The most suitable options for the Chronomat 40 GMT include: vegetable-tanned alligator for an elegant yet professional register, box-calf leather for formal use, vulcanised rubber to maintain the sporty character of the stainless steel case, and ballistic nylon NATO for maximum practicality. The choice depends on intended use and the chromatic pairing with the dial.

Strap replacement requires a fine-tipped or forked spring bar tool. The spring bars on the Chronomat 40 are released by compressing their ends from inside the lug channel. It is advisable to work on a soft surface to avoid scratching the case, and to verify that the replacement spring bars are the correct diameter for 20mm lugs.

Yes, any strap with a 20mm attachment width is technically compatible with the Chronomat 40 GMT. For optimal fit, straps with a slightly curved end or made from flexible materials are recommended, as they follow the profile of the case more naturally. Milanostraps.it offers a curated selection of handcrafted 20mm straps compatible with this reference.

The lifespan of a leather strap depends on the material, frequency of use, and exposure to perspiration and moisture. A quality alligator strap, properly maintained with appropriate conditioners, can last between two and five years with regular wear. Calf leather typically has a shorter lifespan. Casati Milano straps in vegetable-tanned leather, with their calibrated thickness and hand-finished edges, offer above-average durability compared to industrially produced alternatives.