Breitling · AVI

Strap for Aviator 8 Chronograph 43 Stainless Steel / Black / Calf / Folding

Takes 23 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width23 mm
Case diameter43 mm
ReferenceA13316101B1X4
FamilyAVI
MovementBreitling caliber 13 hours, minutes, small seconds | date | Chronograph
Year2019
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The AVI A13316101B1X4, seen from the bench

The Breitling AVI A13316101B1X4 is a reinterpretation of the Ref. 765 AVI, the military aviation instrument adopted in the 1950s. The 43mm stainless steel case features bolted bezels and a legible dial reflecting cockpit aesthetics. The Breitling 13 caliber is an automatic chronograph movement based on ETA Valjoux 7750, offering hours, minutes, small seconds at 9 o'clock, date, and chronograph function. Water-resistant with screw-down caseback, it has a 23mm lug width—a non-standard size requiring custom straps.

Frequently asked questions

What is the lug width of the Breitling AVI A13316101B1X4?

The lug width of the Breitling AVI A13316101B1X4 is 23 mm. This is a non-standard measurement that requires straps made to measure or sourced from specialist catalogues. Ordering exactly 23 mm is essential to ensure correct fitment between the lugs and through the keepers.

What is the best strap for the Breitling AVI A13316101B1X4?

For the Breitling AVI A13316101B1X4, the most suitable materials are vegetable-tanned calf leather for an authentic vintage-tool aesthetic, Hornback alligator for a formal register, and technical nylon NATO for intensive daily use in keeping with the aviator DNA. The choice depends on the dial variant and intended context.

How do you change the strap on a Breitling AVI A13316101B1X4?

The strap on the Breitling AVI A13316101B1X4 is removed using a fine-tipped springbar tool or a dedicated strap-changing knife. Apply gentle pressure to the end of the springbar inside the lug to release it. It is advisable to work on a soft surface to protect the case and to use reinforced springbars of 1.8 mm diameter to ensure secure retention in 23 mm lugs.

Are there aftermarket straps compatible with the Breitling AVI A13316101B1X4?

Yes, aftermarket straps compatible with the Breitling AVI A13316101B1X4 are available, but the 23 mm lug width requires careful selection. milanostraps.it offers a range of straps made precisely to 23 mm in various materials, with standard buckles or deployant clasps, compatible in both dimension and quality with this Breitling chronograph.

How long does a leather strap last on a Breitling AVI A13316101B1X4?

The lifespan of a leather strap depends on hide quality, maintenance and frequency of use. A quality vegetable-tanned calf strap, conditioned regularly and protected from excessive moisture, can last between two and five years with daily wear. High-grade alligator straps, owing to the density of the scale fibre, tend to last longer whilst developing a distinctive patina.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only