Technical Archive

Breitling
Navitimer A77320D91K1A1— lug 16mm

Breitling Navitimer A77320D91K1A1: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Navitimer Quartz 32 Stainless Steel / Pink MOP / Bracelet

Artisanal Note

"This model requires a precise 16mm lug width to preserve the original sartorial balance."

Technical Specifications

Breitling A77320D91K1A1
Lug Width
16 mm

The essential strap measurement.

Browse 16mm straps →
Reference

A77320D91K1A1

Movement

Breitling caliber Caliber 77 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Breitling Navitimer A77320D91K1A1 is a 32mm stainless steel version of the iconic aviation watch born in 1952. It features the integrated slide rule on the bezel with scales for speed, fuel range, and conversions. The Breitling caliber 77 movement is COSC-certified chronometer with precision between -4 and +6 seconds daily, offering hours, minutes, seconds, and date. The 16mm lug width derives from the 32mm case diameter, following established watchmaking proportions.

FAQ

What is the lug width of the Breitling Navitimer A77320D91K1A1?

The Breitling Navitimer A77320D91K1A1 has a lug width of 16mm. This measurement is determined by the 32mm case diameter and is the standard for this compact Navitimer variant. Always verify the measurement by placing a calliper between the two lugs at the strap attachment point, not across the dial.

What is the best strap for the Breitling Navitimer A77320D91K1A1?

For the Navitimer A77320D91K1A1, vegetable-tanned calf leather is the most versatile option, developing a natural patina that complements the instrument-style dial. Alligator leather adds grain and visual depth for formal occasions, while a NATO nylon strap references the model's aeronautical origins. All straps must feature a 16mm attachment width.

How do you change the strap on a Breitling Navitimer A77320D91K1A1?

To replace the strap on the Navitimer A77320D91K1A1, a spring bar tool is required to release the bars securing the strap to the 16mm lugs. Care must be taken to avoid scratching the stainless steel case. It is advisable to have the work carried out by a watchmaker or a specialist atelier such as Casati Milano for a precise and safe result.

Are there aftermarket straps compatible with the Breitling Navitimer A77320D91K1A1?

Yes, the Navitimer A77320D91K1A1 accepts any strap with a 16mm attachment width and standard length (typically 70/115mm or 65/105mm for the 32mm case size). On milanostraps.it you will find a curated selection of handcrafted compatible straps in leather, rubber and NATO, available in ready-to-wear and bespoke versions.

How long does a leather strap last on a Breitling Navitimer?

The lifespan of a leather strap depends on material quality and maintenance. A high-quality vegetable-tanned calf strap, rotated regularly and kept away from prolonged exposure to water and perspiration, can last between two and four years. Shell cordovan, due to its exceptionally dense fibre structure, typically offers superior resistance to wear over time.