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Breitling · AVI

Strap for Navitimer 8 43 Unitime Stainless Steel Prototype

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

Lug width

23mm
23 mm strapsAll Breitling
Lug width23 mm
Case diameter43 mm
ReferenceAB352113
FamilyAVI
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

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The AVI AB352113, seen from the bench

The Breitling AVI AB352113 is a contemporary pilot chronograph inspired by 1950s military cockpit instruments. The 43mm stainless steel 316L case features a screw-down crown, pressure-fitted bezel, and three-counter dial for immediate readability. The Calibro B01 automatic movement is COSC-certified, offering 70-hour power reserve and 28,800 vph with column-wheel chronograph for precise engagement. Water-resistant to 100m, the watch has a 23mm lug width designed to preserve original 1950s proportions. This non-standard dimension requires specific aftermarket straps.

Frequently asked questions

What is the lug width of the Breitling AVI AB352113?

The Breitling AVI AB352113 features a lug width of 23mm. This is a non-standard measurement, deliberately chosen by Breitling to preserve the proportions of the original 1950s aviation chronographs. It is essential to use straps specifically manufactured for this width, as 22mm or 24mm straps will not fit the case lugs correctly.

What is the best strap for the Breitling AVI AB352113?

The ideal strap depends on intended use and personal style. For formal or dress wear, a matte Louisiana alligator strap in brown or olive green complements the instrument character of the AVI. For everyday use, a vegetable-tanned calf leather strap offers durability and develops a refined patina over time. A NATO nylon strap suits an operational, aviation-inspired look. In all cases, the correct lug width of 23mm must be observed.

How do I change the strap on a Breitling AVI AB352113?

To remove the strap, use a fine-tipped spring bar tool. Insert the tip into the notch at the side of the lug, compress the spring bar, and slide the strap free. Breitling AVI spring bars are standard diameter. The operation can be carried out independently with care, or entrusted to a watchmaker or the Casati Milano atelier for a professional replacement without risk of scratching the case.

Are there compatible aftermarket straps for the Breitling AVI AB352113?

Yes, high-quality aftermarket straps compatible with the Breitling AVI AB352113 are available, provided they are made to the correct lug width of 23mm. Milano Straps offers a curated selection of handcrafted straps in this size, across various materials and finishes. It is also important to verify the spring bar diameter and the strap profile, which should follow the curvature of the case for an optimal fit.

How long does a leather strap last on the Breitling AVI AB352113?

The lifespan of a leather strap depends on the material, tanning quality, and conditions of use. A quality vegetable-tanned calf leather strap worn daily and kept away from water and perspiration will remain in excellent condition for 2 to 4 years. High-grade Louisiana alligator can last in excess of 5 years with proper care. Casati Milano provides an 18-month guarantee against manufacturing defects on all bespoke straps.

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