Strap for Navitimer B01 Chronograph 46 Stainless Steel / Black / Bracelet

The lug width of the Breitling Navitimer AB0137211B1A1 is precisely 24 millimetres. This measurement is specific to this model and reflects the proportions of the 46mm case. To verify it, position a digital calliper inside the lug slots and measure the distance between the two attachment points: it must be exactly 24mm. A strap even slightly narrower (23mm) will not fit into the lugs, whilst one wider (25mm) will not seat securely.

For the Navitimer AB0137211B1A1, we recommend three primary materials based on intended use. Alligator leather in vegetable tanning is the most elegant solution for formal contexts: it develops natural patina and contrasts perfectly with the black dial. Shell cordovan offers exceptional durability and a rich patina, ideal for daily wear. For practicality and resistance to variable conditions, FKM synthetic rubber or woven NATO straps maintain full technical functionality. The ideal strap thickness is at least 1.4–1.5mm to support the weight of the 46mm case.

Changing the strap on your Breitling Navitimer AB0137211B1A1 is straightforward. Position the watch on a soft surface (microfibre cloth) with the case back facing upwards. Locate the spring bars inside the lug slots: using a dedicated spring bar tool or small tweezers, gently compress the spring from one side, extract the bar, and remove the old strap. Insert the new strap by aligning the holes with the spring bar, compress the opposite side, and secure the bar. Verify that both lugs are properly engaged before wearing the watch.

Yes, provided the lug width is exactly 24 millimetres. Aftermarket straps offer greater aesthetic variety and often better value than Breitling original straps. Ensure the new strap is constructed from solid materials (at least 1.4mm thickness) and that the spring bars are compatible. Avoid straps with applied finishes or excessive thinness: the 46mm Navitimer requires robust construction. milanostraps.it catalogues 24mm straps specifically for this model, customisable for length and finish.

A leather strap's lifespan depends on tanning method, thickness, and wear patterns. An alligator or calf strap in vegetable tanning at 1.5mm, worn daily, typically lasts 3–5 years before fibres begin to yield along the fold line. Shell cordovan, denser and more resilient, can last 5–8 years or longer. Aging is not a defect: leather develops patina and character. To extend lifespan, avoid prolonged moisture exposure and occasionally apply natural wax conditioner. Casati Milano's 18-month warranty covers manufacturing defects and anomalous wear, guaranteeing craftsmanship quality.