Technical Archive

Breitling
Navitimer A77320E61A2A1— lug 16mm

Breitling Navitimer A77320E61A2A1: 16mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Navitimer Quartz 32 Stainless Steel / MOP / Bracelet

Artisanal Note

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

Technical Specifications

Breitling A77320E61A2A1
Lug Width
16 mm

The essential strap measurement.

Browse 16mm straps →
Reference

A77320E61A2A1

Movement

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

The Heritage

The Breitling Navitimer Quartz 32 ref. A77320E61A2A1 features a 32mm stainless steel case with a tri-compax chronograph dial and circular slide rule bezel, redesigned from the original 1952 aviation icon. The watch is equipped with the Breitling 77 manual-wind movement certified COSC with ±4 seconds per day accuracy. The 16mm lug width is specific to this model and differs from larger Navitimer sizes; precise measurement is essential before selecting compatible aftermarket straps.

FAQ

What is the lug width of the Breitling Navitimer A77320E61A2A1?

The Breitling Navitimer A77320E61A2A1 has a lug width of 16mm. This measurement, taken internally between the two case lugs using a digital calliper, is essential for selecting any compatible aftermarket or replacement strap.

What is the best strap for the Breitling Navitimer A77320E61A2A1?

For a 32mm steel case, a smooth vegetable-tanned calf leather strap is the most versatile choice: it complements the compact profile without overwhelming it and develops a personal patina over time. Fine-scale alligator suits formal occasions, whilst a nylon NATO introduces an aeronautical, sportier aesthetic. A steel deployant clasp improves weight distribution across the case for any material selected.

How do you change the strap on a Breitling Navitimer A77320E61A2A1?

The strap on the Navitimer A77320E61A2A1 is secured by standard 16mm spring bars. To replace it, use a spring bar tool or a dedicated lug knife: compress the spring bar, slide the strap free from the lug, and fit the new one. No watchmaker is required, though it is advisable to work on a soft surface to avoid scratching the case.

Are there aftermarket straps compatible with the Breitling Navitimer A77320E61A2A1?

Yes. Any strap with a standard 16mm spring bar fitting is technically compatible with the Navitimer A77320E61A2A1. Milano Straps offers a curated selection of 16mm straps in leather, alligator, shell cordovan and NATO, handcrafted in Italy, with full bespoke customisation available through Casati Milano atelier.

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

The lifespan of a leather strap depends on the hide, tanning method and daily use. A good-quality vegetable-tanned calf strap, properly maintained, typically lasts 2–4 years. High-grade alligator can exceed 5 years if kept away from prolonged exposure to water and perspiration. Casati Milano straps carry an 18-month warranty against manufacturing defects.