Strap for Breitling Chronomat Automatic GMT 40 NFL San Francisco 49ers Edition

The lug width of the Breitling Chronomat 40 GMT A32398B61K1A1 is 20mm. This measurement refers to the internal distance between the case lugs and determines the correct strap width to purchase. It is always advisable to verify this with a digital calliper before placing an aftermarket order.

For the Chronomat 40 GMT, vegetable-tanned alligator or shell cordovan straps offer the finest balance between artisanal elegance and the instrument-grade character of the watch. For sporting or maritime use, vulcanised rubber is the most functional choice. A nylon NATO strap recalls the brand's established aeronautical tradition.

The strap on the Chronomat 40 GMT is removed using standard 20mm spring bars, with a dedicated spring bar tool or angled screwdriver. The lugs have a slight downward curve, so it is advisable to choose straps with a curved or semi-curved end to ensure a clean fit against the case and avoid any visible gap.

Yes, the aftermarket for 20mm straps is extensive. Any strap with 20mm lugs and an 18mm or 20mm tail is compatible with the Chronomat 40 GMT A32398B61K1A1. Milanostraps.it offers a curated selection of handcrafted leather, NATO and rubber straps specifically sourced for this lug width.

The lifespan of a leather strap depends on the material, frequency of wear and exposure conditions. A quality vegetable-tanned alligator strap, maintained regularly with appropriate leather care products, typically lasts 3 to 5 years with daily use. Shell cordovan tends to last longer due to the density of its fibres. Milanostraps.it provides an 18-month guarantee against manufacturing defects on all Casati Milano straps.