Strap for Navitimer 8 Automatic Day & Date 41 Stainless Steel / Blue / Black Calf / Folding

The Breitling AVI A45330101C1X4 has a lug width of 21mm, measured internally between the lugs at the narrowest point using a calliper. This is a non-standard size that requires dedicated artisan-made straps.

It depends on intended use and aesthetic preference. For a formal register, a padded alligator strap with a steel deployant clasp complements the in-house B09 calibre. For a tool watch aesthetic faithful to the AVI's origins, a heavy-duty 21mm nylon NATO or a vegetable-tanned calf strap are the most coherent choices.

The strap is removed using a fine-tipped spring bar tool, applying gentle pressure against the spring bar from inside the lug. Work on a soft surface to protect the stainless steel case from scratches. Ensure the replacement spring bar diameter is compatible with the Breitling lug hole.

Yes. Any 21mm lug width strap with an appropriate internal keeper width is compatible. Milanostraps offers a curated selection of handcrafted 21mm straps — from leather to NATO — made with selected materials and hand-stitched, all compatible with the A45330101C1X4.

A quality leather strap on a Breitling AVI typically lasts between 18 and 36 months with regular wear, depending on the material, frequency of use, and exposure to perspiration and moisture. Shell cordovan and vegetable-tanned alligator tend to last longer, developing a natural patina over time. Casati Milano offers an 18-month guarantee against manufacturing defects on all artisan straps.