Strap for Chronomat Evolution Stainless Steel / Blue - Roman

The lug width of the Breitling Chronomat Evolution A1335611/C749 is 20mm. This measurement is taken between the two lugs of the case using a calliper or a millimetre ruler, at the point where the strap attaches. It is one of the most common lug widths found in high-end sport watchmaking.

For the Chronomat Evolution, the most suitable materials are vegetable-tanned alligator for a dress-sport aesthetic, bombé calfskin for everyday wear, and vulcanised rubber for sporting or marine contexts. A steel deployant clasp is recommended for any leather strap to prevent deformation from repeated fastening. The ideal choice depends on the dial colour: with a black dial, dark brown, midnight blue and dark grey work particularly well.

Changing the strap on the Chronomat Evolution requires a spring bar tool or lug lever to remove the spring bars securing the strap to the lugs. The Chronomat's lugs have a relatively high profile, so it is advisable to check the heel thickness of the new strap for a proper fit without gaps or visual misalignment. For a scratch-free swap, it is recommended to consult a watchmaker or the Casati Milano atelier.

Yes, the 20mm lug width is a universal standard compatible with a wide range of aftermarket straps. Milanostraps.it offers a selection of 20mm straps in alligator, calfskin, shell cordovan, NATO and rubber, all compatible with the Chronomat Evolution A1335611/C749. For a bespoke option, the Casati Milano atelier crafts made-to-measure straps with direct leather selection and an 18-month production guarantee.

The lifespan of a leather strap depends on the quality of the material, frequency of wear and maintenance. A high-quality alligator or shell cordovan strap with vegetable tanning can last between 3 and 7 years with proper care: avoid prolonged exposure to water and perspiration, occasionally apply a neutral conditioner, and rotate straps if the watch is worn daily. Using a deployant clasp significantly reduces mechanical stress on the strap.