Strap for Chronomat B01 42 NFL Baltimore Ravens / Rouleaux

The lug width of the Breitling Chronomat B01 42 AB01342B1K2A1 is 22 mm. This measurement should be taken with a digital calliper directly between the lugs, at the point where the strap seats, to ensure a precise fit with no lateral play.

For the Chronomat B01 42, the most suitable materials are vegetable-tanned calf leather for everyday wear with natural patina development, Mississippiensis alligator for formal settings, vulcanised rubber for active sports use, and technical nylon NATO for an outdoor aesthetic. The choice depends on the intended use and the dial colour being paired.

The strap is replaced using a flat-tipped spring bar tool or a dedicated lever instrument, pressing against the spring bars housed within the lugs. It is advisable to work on a soft watchmaker's mat to protect the case from scratches. If in doubt, a watchmaker or the Casati Milano atelier can perform the swap in a matter of minutes during an appointment.

Yes. Any strap with a 22 mm lug width and standard spring bars is compatible with the Chronomat B01 42 AB01342B1K2A1. Milano Straps offers a selection of handcrafted leather, rubber and textile straps specifically sized at 22 mm, with finishes and materials chosen to complement the sporting aesthetic of this chronograph.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily use. A quality vegetable-tanned calf strap, with periodic conditioning cream and protection from moisture, will maintain its structural integrity for 2–4 years of regular wear. Alligator, owing to the natural density of its fibre, tends to last considerably longer. Milano Straps backs its straps with an 18-month guarantee against manufacturing defects.