Breitling · AVI

Strap for Navitimer 8 Automatic 41 Stainless Steel Prototype

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter41 mm
ReferenceA1731410
FamilyAVI
MovementBreitling caliber Caliber 17 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the AVI A1731410

Selected for the 21 mm lug width

All 21 mm straps →

The AVI A1731410, seen from the bench

The Breitling AVI A1731410 is a 41 mm stainless steel automatic chronograph inspired by 1950s aviation instruments. Powered by Caliber 17 (ETA 2824-2 base with chronograph module), it features a tonneau case, integrated bezel, black dial with applied luminous indices, and a screwed caseback. The 21 mm lug width reflects Breitling's design philosophy prioritizing correct proportions. Built for function over aesthetics, this instrument combines immediate readability with water resistance and sapphire crystal with anti-reflective coating.

Frequently asked questions

What is the lug width of the Breitling AVI A1731410?

The lug width of the Breitling AVI A1731410 is 21 mm. This is an unconventional measurement specific to this reference, requiring dedicated 21 mm straps to ensure a precise fit and correct visual continuity with the stainless steel case.

What is the best strap for the Breitling AVI A1731410?

The most coherent choices for the Breitling AVI A1731410 are vegetable-tanned calfskin in tobacco or cognac tones, flat-belly alligator for a more formal register, two-tone nylon NATO to reference military aviation codes, and vulcanised rubber for sporting use. The choice depends on the intended use and desired aesthetic register.

How do I change the strap on the Breitling AVI A1731410?

To replace the strap on the Breitling AVI A1731410, use a spring bar tool or fine-tipped lug remover to extract the 21 mm spring bars housed in the lugs. Proceed carefully to avoid scratching the brushed stainless steel case. Alternatively, a watchmaker or the Casati Milano atelier can carry out the replacement during the bespoke service.

Are there aftermarket straps compatible with the Breitling AVI A1731410?

Yes, high-quality aftermarket straps compatible with the Breitling AVI A1731410 are available, provided they feature a 21 mm lug width and, preferably, shaped ends to suit the curved lug profile. Milanostraps.it offers a curated selection of handcrafted 21 mm straps made by Casati Milano, with materials and finishes selected specifically for this reference.

How long does a leather strap last on the Breitling AVI A1731410?

The lifespan of a leather strap on the Breitling AVI A1731410 depends on the quality of the leather and frequency of use. A high-quality vegetable-tanned strap, with proper care, will last between two and five years with daily wear. Shell cordovan develops a patina over time and can last considerably longer. Avoiding prolonged exposure to perspiration and water will significantly extend the strap's service life.

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