Breitling
Navitimer A173952A1C1A1— lug 18mm

The Breitling Navitimer A173952A1C1A1 features an 18mm lug width. This measurement refers to the internal distance between the two lugs of the case and determines the compatible strap width. It is advisable to verify this measurement with a calliper before purchasing any aftermarket strap.

For the 35mm Navitimer, a vegetable-tanned calfskin or alligator strap are the most coherent choices with the model's instrumental aesthetic. Calfskin develops a personal patina over time, whilst alligator with Hornback grain moves the dial towards a more formal register. A technical nylon NATO is suitable for those who favour the original aeronautical reading of the watch.

To replace the Navitimer strap, a flat-tipped spring bar tool or a dedicated tool is required. Insert the tool into the gap between the lug and the strap, compress the ends of the spring bar and slide out the strap. The operation does not require specialist watchmaking skills, but should be carried out carefully to avoid scratching the case. If in doubt, it is preferable to consult a watchmaker.

Yes. Any strap with an 18mm attachment is technically compatible with the Navitimer A173952A1C1A1. Milanostraps.it offers a selection of 18mm straps in various materials — leather, alligator, NATO, rubber — handcrafted with keeper and buckle that can be coordinated with the steel case. The choice of material and length depends on use and aesthetic context.

The lifespan of a leather strap depends on the material, care and intensity of use. A well-maintained vegetable-tanned calfskin strap — avoiding prolonged contact with water and occasionally applying a leather conditioner — lasts on average 2–4 years with daily use. Shell cordovan and alligator, thanks to the density of the fibres and deeper tanning process, can last considerably longer with appropriate care.