Breitling
Navitimer A77320D91K1P1— lug 16mm

The Breitling Navitimer A77320D91K1P1 has a lug width of 16mm. This measurement must be taken with a calliper between the two lugs, at the narrowest point closest to the case. Any aftermarket strap must have a 16mm end width to ensure a precise and secure fit.

For the stainless steel Navitimer 32mm, a vegetable-tanned alligator strap with a polished finish is the most coherent choice: the bombé grain engages visually with the polished case components. Smooth vegetable-tanned calf leather develops a refined patina over time, while a heavy-weave NATO strap pays direct homage to the model's aviation heritage. Vulcanised rubber is preferable for intensive sporting use.

To replace the strap on the Navitimer A77320D91K1P1, use a fine-tipped or spatula-style spring bar tool. Insert the tool into the lug hole or between the lug and the strap keeper, apply gentle leverage to compress the spring bar, and slide the strap free. Repeat on the other side. To fit a new 16mm strap, insert one end of the spring bar into the lug hole, compress the spring on the opposite side and hook it into the second hole. No specialist tools are required.

Yes. Any strap with a 16mm attachment width is technically compatible with the Navitimer 32. Milano Straps and Casati Milano atelier produce bespoke straps in alligator, calf leather, shell cordovan and other materials, specifically calibrated for this lug width, with the option of a pin buckle or deployant clasp in stainless steel.

The lifespan of a leather strap depends on the quality of the hide and frequency of use. A high-grade alligator or vegetable-tanned calf strap, with regular use and periodic conditioning (leather cream every 3–6 months), typically lasts between 3 and 6 years. Prolonged exposure to water, perspiration and UV radiation accelerates deterioration. Casati Milano straps carry an 18-month guarantee against manufacturing defects.