Breitling · AVI

Strap for Navitimer 8 Super 8 B20 Automatic 46

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

Lug width23 mm
Case diameter46 mm
ReferenceAB2040101B1X1
FamilyAVI
MovementBreitling caliber B20 hours, minutes, seconds | date | chronometer
Year2018
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 AB2040101B1X1, seen from the bench

The Breitling AVI Ref. 765 1953 Re-Edition (AB2040101B1X1) is a faithful recreation of a 1950s military fighter aircraft chronograph. It features a 46mm stainless steel case with bi-directional ratchet bezel, black dial with applied indexes, screw-down crown, and asymmetrical white sub-dials. The B20 caliber, derived from Swiss-made ETA Valjoux movement and COSC certified, offers hours, minutes, seconds, date, and chronograph functions with 42-hour power reserve. Water resistant to 100 meters with sapphire crystal. The 23mm lug width is specific to this reference and requires custom-made straps.

Frequently asked questions

What is the lug width of the Breitling AVI AB2040101B1X1?

The Breitling AVI AB2040101B1X1 features a lug width of 23mm. This is a proprietary measurement, not a standard size, requiring straps manufactured specifically for this width. Before purchasing an aftermarket strap, it is advisable to verify the measurement using a digital calliper inserted between the case lugs.

What is the best strap for the Breitling AVI AB2040101B1X1?

The most suitable straps for the Breitling AVI AB2040101B1X1 are military-grain matte calf leather, alligator with symmetrical belly scales, nylon NATO for a tool-watch aesthetic, or vulcanised rubber for sporting use. The choice depends on the context: a tobacco brown calf leather strap with visible stitching is the most coherent pairing with the model's aeronautical heritage.

How do you change the strap on a Breitling AVI AB2040101B1X1?

The strap on the Breitling AVI AB2040101B1X1 is removed using a fine-tipped spring bar tool inserted into the lateral notch of the spring bar between the lug and the strap. Gentle pressure retracts the spring bar and releases the strap. The new 23mm strap is fitted by positioning the spring bar in the strap hole and compressing it until it clicks into the opposite lug. This can be done independently with the appropriate tools.

Is there an aftermarket strap compatible with the Breitling AVI AB2040101B1X1?

Yes. Milanostraps.it offers handcrafted aftermarket straps with a 23mm lug width, compatible with the Breitling AVI AB2040101B1X1. Straps are available bespoke or in standard sizes with shaped ends for a clean fit between the original lugs. A range of materials, finishes and buckle options are available, including a brushed steel deployant clasp.

How long does a leather strap last on a Breitling AVI AB2040101B1X1?

The lifespan of a leather strap on a Breitling AVI AB2040101B1X1 depends on leather quality, frequency of wear and maintenance. A quality vegetable-tanned strap, nourished with leather cream and kept away from prolonged water exposure, can last between 3 and 5 years with regular daily use. Watch-grade alligator straps typically offer greater longevity due to the density of the hide fibre. Casati Milano straps carry an 18-month warranty against manufacturing defects.

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