Strap for Navitimer 1 B01 Chronograph 43 Stainless Steel / Airline Editions American Airlines / Calf / Pin

The lug width of the Breitling Navitimer AB0121A31C1X1 is 20mm. This measurement is taken internally between the two lugs of the case using a millimetre calliper, positioned at the strap attachment point. It is a standard dimension across the Navitimer family, ensuring wide compatibility with aftermarket straps.

The most suitable materials for the Navitimer AB0121A31C1X1 are vegetable-tanned alligator leather in a matt finish, which complements the complexity of the dial, shell cordovan for a refined and compact profile, and technical nylon NATO for active use. A steel deployant clasp is recommended to maximise comfort when operating the chronograph pushers.

To replace the strap on the Navitimer AB0121A31C1X1, you will need a fine-tipped spring bar tool. The 20mm spring bars are fitted internally within the case lugs. Insert the tip into the spring bar notch, compress inward, and slide the strap out laterally. Take care not to scratch the satin case finishing. If in doubt, consult a watchmaker or the Casati Milano atelier.

Yes, the Navitimer AB0121A31C1X1 features a standard 20mm lug width compatible with any aftermarket strap of that size. Milanostraps.it offers a selection of handcrafted leather, rubber and nylon straps made specifically for this width, supplied with spring bars and finishes suited to the Navitimer's stainless steel case.

The lifespan of a leather strap depends on daily use, perspiration exposure and leather quality. A handcrafted alligator or shell cordovan strap with vegetable tanning typically lasts 2–4 years with regular wear. Maintenance with neutral leather cream and rotation between multiple straps will significantly extend the material's life. Casati Milano provides an 18-month guarantee against manufacturing defects.