Strap for Chronomat B01 42 Stainless Steel / Red Gold / Green / Korea

The lug width of the Breitling Chronomat B01 42 UB01342A1L1U1 is 22mm. This measurement is taken with a digital calliper positioned inside the lugs, between the two shoulders of the case, and is the key reference for selecting a strap that fits without lateral play.

For the Chronomat B01 42 in steel and red gold, the most harmonious options are a belly-cut alligator strap in mahogany or tobacco tones — which complements the red gold components — or a vegetable-tanned calfskin strap with contrast stitching to reinforce its aeronautical character. A dense-weave NATO strap provides an authentic sporting alternative.

The strap is replaced using a flat-tipped spring bar tool or a dedicated watch screwdriver. The Chronomat B01 42 lugs accommodate standard 22mm spring bars, which are released by pressing on the notch at the side of the lug. Always work on a soft surface to avoid scratching the case, and consult a qualified watchmaker if in doubt.

Yes. Any strap with a 22mm lug width is technically compatible with the Chronomat B01 42. Milano Straps offers a curated selection of handcrafted leather, NATO and rubber straps sized for this measurement, fitted with premium stainless steel or red gold PVD buckles.

The lifespan of a leather strap depends on the quality of the tanning process, daily care and exposure to perspiration and moisture. A high-quality artisan-crafted alligator or vegetable-tanned calfskin strap, properly conditioned and rotated with other straps, can last between three and seven years while retaining its aesthetic integrity and structural soundness. Milano Straps provides an 18-month guarantee against manufacturing defects.