Breitling
AVI A1731S1A1B1X1— lug 21mm
Breitling AVI A1731S1A1B1X1: 21mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 21mm lug width to preserve the original sartorial balance."
Technical Specifications
Breitling A1731S1A1B1X1The essential strap measurement.
Browse 21mm straps →A1731S1A1B1X1
Breitling caliber Caliber 17 Hours, Minutes, Seconds | Date
The Heritage
Compatible Straps
Selected for the 21mm lug width of the AVI
FAQ
What is the lug width of the Breitling AVI A1731S1A1B1X1?
The Breitling AVI A1731S1A1B1X1 has a lug width of 21mm — a specific measurement of the AVI line, not interchangeable with the more common 20mm or 22mm. To verify it, measure the inner distance between the two lugs using a digital calliper at the narrowest point.
What is the best strap for the Breitling AVI A1731S1A1B1X1?
For the AVI A1731S1A1B1X1, a vegetable-tanned Louisiana alligator strap strikes the most balanced combination of formal register and technical character. Alternatively, a box calf strap for everyday wear or a ballistic nylon NATO for outdoor use, both in 21mm.
How do you change the strap on a Breitling AVI A1731S1A1B1X1?
The strap is removed using a 21mm springbar tool. With a flat-head screwdriver or a dedicated springbar tool, compress the spring bar laterally until it clears the lug hole. No case disassembly is required and the operation can be completed in a matter of minutes without specialist equipment.
Are there aftermarket straps compatible with the Breitling AVI A1731S1A1B1X1?
Yes. Any strap with a 21mm attachment and standard spring bars is compatible with the AVI A1731S1A1B1X1. Milanostraps.it offers a curated selection of handcrafted 21mm straps, with options for bespoke leather, stitching and buckle customisation through the Casati Milano service.
How long does a leather strap last on a Breitling AVI A1731S1A1B1X1?
Longevity depends on the leather and frequency of use. A quality vegetable-tanned alligator strap, maintained periodically with neutral wax, typically lasts 3–5 years. A standard calf strap has a useful life of 1–2 years with daily wear. Casati Milano straps carry an 18-month guarantee against manufacturing defects.