Strap for Chronomat Evolution Stainless Steel / Black

The lug width of the Breitling Chronomat Evolution A1335611/B721 is 20mm. This measurement is taken at the inner distance between the lugs at the spring bar attachment point. Any standard 20mm strap will be compatible with this reference.

The ideal choice depends on intended use and aesthetic preference. For a refined look, a belly-cut alligator strap paired with a brushed steel deployant clasp complements the instrument-grade character of this chronograph. For sport or summer use, a vulcanised rubber strap offers superior grip and moisture resistance. Shell cordovan is recommended for those seeking long-term durability and a noble patina that develops with wear.

Strap replacement requires removing the spring bars that connect the strap to the case lugs. A forked spring bar tool or a dedicated watch lever is used for this purpose. Care should be taken to protect the steel lugs from scratching — a soft pad beneath the watch is advisable. Alternatively, any watchmaker can perform the swap in a matter of minutes.

Yes. The 20mm lug width is one of the most widespread standards in watchmaking, ensuring broad compatibility with quality aftermarket straps. Milanostraps.it offers a curated selection of artisanal leather, rubber and textile straps in 20/18mm width, with lengths suited to the 43.7mm case of the Chronomat Evolution.

With standard care — drying after moisture exposure, rotating between multiple straps and occasional conditioning — a quality artisanal leather strap typically lasts between two and four years. Alligator and shell cordovan, owing to their fibre density, offer greater longevity than standard calf leather. Casati Milano provides an 18-month production defect warranty on all atelier straps.