Strap for Navitimer B01 Chronograph 43 Red Gold / Green / Boutique Edition

The Breitling Navitimer RB01384A1L1P1 features a 22mm lug width, standard across the entire 43mm Navitimer family. The measurement should be taken internally between the two lugs, at the point where they meet the case, using a vernier calliper to ensure the precision required for a correct strap fitting.

For an 18-carat red gold case, the most coherent materials are semi-gloss alligator leather in cognac, tobacco or black with amber contrast stitching, and vegetable-tanned calf leather for a more understated approach. Both develop a patina that harmonises with the warmth of the metal over time. Shell cordovan is a compelling alternative for those seeking character without the formality of alligator.

Strap replacement requires a 22mm spring bar, removable with a fine-tipped springbar tool. The Navitimer features slightly curved lugs with internal thickness: care is advised to avoid scratching the red gold case. Alternatively, a watchmaker or the Casati Milano atelier can carry out the swap safely, also checking the correct tension of the spring bar.

Yes, the 22mm format is widely available on the aftermarket. It is essential to verify that the strap has straight or minimally curved ends, compatible with the Navitimer's lug geometry. Milano Straps offers a curated selection of handcrafted 22mm straps — in alligator, vegetable-tanned calf, shell cordovan and rubber — finished with spring bars suited to the red gold case.

The lifespan of a leather strap depends on the material, maintenance and intensity of use. A quality vegetable-tanned calf strap, with daily wear and regular care (dry cleaning, occasional conditioning with a neutral cream, rotation with other straps), can last between 18 and 36 months. CITES-certified alligator and shell cordovan, thanks to their denser fibre structure, tend to offer a longer service life. Casati Milano provides an 18-month warranty against manufacturing defects on all its straps.