Strap for Chronomat B01 42 Stainless Steel / Grey / Japan

The lug width of the Breitling Chronomat B01 42 AB01343B1M1S1 is 22mm. This measurement is taken between the inner edges of the lugs where the strap inserts, ideally using a digital calliper for accuracy.

The most suitable straps for the Chronomat B01 42 are alligator leather with vegetable tanning and classic bombé grain for a sport-formal aesthetic, box calf leather for a refined and understated look, or rubber and NATO for purely dynamic contexts. The correct width is 22mm.

The strap on the Chronomat B01 42 is removed using a springbar tool, inserting the flat tip into the lug hole to compress the spring bar. This can be done independently with care, or entrusted to a watchmaker or Breitling boutique.

Yes, many artisan manufacturers produce 22mm aftermarket straps compatible with the Chronomat B01 42. It is important to verify that the strap ends are slightly curved to follow the Breitling case profile, and that the spring bars have the correct diameter for 22mm lugs.

The lifespan of a leather strap depends on leather quality and daily use. A high-quality alligator or vegetable-tanned calf strap, properly maintained, typically lasts 2–4 years of regular wear. Avoiding prolonged contact with water and perspiration significantly extends the strap's service life.