Breitling
Navitimer A173951A1K1P1— lug 18mm

The Breitling Navitimer A173951A1K1P1 has an 18mm lug width. This measurement should be taken with a digital calliper between the inner faces of the lugs at their narrowest point to ensure a precise strap replacement without any modification.

For the steel-cased Navitimer 35mm, the most coherent options are vegetable-tanned alligator for a sartorial aesthetic, smooth calfskin for professional daily wear, nylon NATO to reference the avionic heritage, and vulcanised rubber for humid or sporting environments. The choice depends on the dial colour and intended use.

Strap replacement requires a fine-tip or fork-type spring bar tool, inserted into the lug hole to compress the spring bar. With an 18mm lug, it is advisable to work on a soft cushion to avoid scratching the case. The operation does not require movement disassembly or watchmaker intervention.

Yes. Any strap with an 18mm attachment is technically compatible with this reference. milanostraps.it offers a selection of handcrafted 18mm straps in various materials, all fitted with standard spring bars compatible with original Breitling lugs.

A quality leather strap typically lasts between 18 and 36 months with regular wear, depending on exposure to perspiration, water and UV light. A vegetable-tanned alligator strap, properly maintained with specialist leather conditioner, can exceed three years while retaining its texture and structural integrity.