Strap for Navitimer 1 B01 Chronograph 43 Stainless Steel / Red Gold / Grey / Croco / Pin

The Breitling Navitimer UB0121211F1A1 features a lug width of 22 mm. This measurement refers to the internal distance between the two lugs of the case, where the strap is fitted. To verify it independently, a digital calliper placed inside the lugs will give an accurate reading.

Given the two-tone steel and red gold case of the Navitimer UB0121211F1A1, a vegetable-tanned alligator strap with a gloss finish in cognac or dark brown best complements the gold details. Alternatively, smooth black calf leather or shell cordovan offer lasting aesthetic appeal and develop a distinctive patina over time. For a more aeronautical feel, NATO straps or rubber are true to the model's heritage.

To replace the strap on the Navitimer UB0121211F1A1, a springbar tool is required. Insert the tip into the lug holes, compress the spring bars and slide the strap out. Care must be taken to avoid scratching the case. If you are unfamiliar with the procedure, it is advisable to have it done by a watchmaker or at the Casati Milano atelier.

Yes, the 22 mm lug width of the Navitimer UB0121211F1A1 is one of the most common standards in high-end watchmaking, and quality aftermarket straps are widely available. Milano Straps offers a curated selection of handcrafted straps in leather, alligator, calf, NATO and rubber, compatible with both tang buckle and deployant clasp closures.

The lifespan of a leather strap depends on the quality of the hide, the tanning method and daily use. A vegetable-tanned alligator or shell cordovan strap, properly maintained and rotated with other straps, can last between three and seven years while developing a distinguished patina. Prolonged exposure to perspiration, water and heat accelerates deterioration; it is advisable to remove the strap during intense physical activity and to treat it regularly with appropriate leather conditioners.