Strap for Navitimer 8 B35 Automatic Unitime 43 Stainless Steel / Silver / Brown Croco / Pin

The Breitling AVI AB3521U01G1P1 features a lug width of 23mm, an unconventional size that distinguishes the entire AVI Re-Edition line from standard production. To verify it, measure with a digital calliper between the two inner lugs of the case, without including the lugs themselves in the measurement.

For the Breitling AVI AB3521U01G1P1, the most suitable materials are fine-grain calf leather for daily wear, vegetable-tanned alligator for formal occasions, and robust nylon NATO for a military aesthetic consistent with the model's aeronautical heritage. The 23mm lug width requires bespoke production or straps specifically made for this format.

The strap on the Breitling AVI AB3521U01G1P1 is replaced using a 23mm spring bar tool, inserted into the hole on each lug. It is advisable to use a professional lever tool or a fine-tip spring bar tool to avoid scratching the stainless steel case. If in doubt, consult a watchmaker or the Casati Milano atelier.

Yes, aftermarket straps compatible with the Breitling AVI AB3521U01G1P1 are available, provided they respect the 23mm lug width. On milanostraps.it you will find a selection of bespoke handcrafted straps in this format, made from various materials including calf leather, alligator, NATO webbing and rubber, with stainless steel buckles and deployant clasps.

The lifespan of a leather strap for the Breitling AVI AB3521U01G1P1 depends on the material and care taken. A quality vegetable-tanned calf leather strap typically lasts 2–4 years with daily use, developing a personal patina over time. A high-grade alligator strap can exceed 5 years if kept away from moisture and intense perspiration. The Casati Milano guarantee covers 18 months against production defects.