Strap for Navitimer 01 46 Stainless Steel / Black / Calf / Pin

The lug width (also called lug spacing or anse width) of the Breitling Navitimer AB012721/BD09/441X/A20BA.1 is 24mm. This dimension is the standard specification for the Navitimer in its large-format versions (46mm) and corresponds to the millimetre distance between the mounting points on the case. To verify this measurement, measure the distance between the two metal lugs positioned at 12 and 6 o'clock on the case: millimetre-level precision is essential to ensure exact compatibility with a replacement strap.

For the Navitimer AB012721/BD09/441X/A20BA.1, genuine alligator leather (compact grain, natural colourways such as bourbon brown or absolute black) is recommended as a traditional solution, or Tuscan or French calf for superior chromatic versatility. NATO textile straps in military-grade canvas represent a contemporary alternative coherent with the aviatory theme, whilst fluoroelastomer rubber guarantees complete water impermeability. The ideal thickness remains 1.4–1.6mm to maintain equilibrium between internal lug containment and structural flexibility.

To change the strap, remove the watch from your wrist and position it with the dial facing downward. Using a dedicated tool (spring bar tool) or a thin rod, gently press downward on the internal spring at the base of one lug to disengage the pin and free it from the case. Extract the pin completely, repeat the procedure for the other lug, then insert the new strap by aligning the holes with the pins and pressing until the locking click is heard. If using a NATO strap, the procedure is even simpler: the fabric passes through both lugs without requiring pins.

Yes, 24mm aftermarket straps are fully compatible with the Breitling Navitimer AB012721/BD09/441X/A20BA.1, provided they strictly respect the 24mm lug width specification. Milano Straps offers a curated selection of handcrafted straps in alligator, calf, shell cordovan and technical materials, customisable in size and colour. It is essential to select manufacturers who understand the constructive specifications of this case (lug groove width, material thickness) to guarantee visual and structural harmony with the chronograph.

The durability of a leather strap depends on material and usage: genuine alligator of superior quality has a lifespan of 7–10 years with ordinary maintenance (dry cloth brushing, neutral cleaner annually). Vegetable-tanned calf achieves 5–8 years, with visible patina development after 6–12 months. Shell cordovan, if subjected to correct initial break-in, exceeds 15 years. Critical factors remain: direct solar exposure, constant humidity, frequent contact with salt water. Milano Straps provides an 18-month warranty on bespoke straps and consultation on seasonal maintenance and buckle replacement if required.