Strap for Pilot Watch Original Dortmund Stainless Steel / Black

The Laco Pilot Watches 861751 features a lug width of 22 millimetres. This dimension represents the distance between the centre of the left lug holes and the centre of the right lug holes. It is a common standard for medium to large wrist watches, ensuring that any 22mm strap fits perfectly to the case without gaps or structural strain.

Given this fliegeruhr's technical vocation, we recommend vegetable-tanned leather straps—particularly Tuscan leather in moka or mahogany brown—or NATO nylon twill straps to preserve historical authenticity. Dark alligator (cigar brown or raven black) is the ideal choice for those seeking elegance without compromise. In outdoor environments or humid climates, vulcanised FKM rubber delivers superior durability and practicality.

Strap changing requires a spring bar tool (a specialised instrument with two flat ends). Position the watch on a stable surface, gently insert one end of the tool into one of the lug's side holes to compress the small internal spring, and simultaneously extract the strap bar. Repeat for the other end. Proceed identically for installing the new strap: insert the bar into the left lug seat, then the right lug seat, verifying both sides click into a stable position. This operation demands care and patience; if unfamiliar with the process, consulting a professional watchmaker is recommended.

Any strap fitted with standard 22-millimetre lug bars is compatible with the 861751. This width is exceptionally widespread, providing access to vast catalogues: from artisanal Florentine leather offerings to military NATO straps, rubber straps to textile elastics. Compatibility is assured by physically measuring the lug width; always verify this dimension before purchase to avoid incompatibility.

A vegetable-tanned leather strap of quality, worn regularly (5–6 days weekly), maintains structural integrity for 2–4 years on average. Longevity depends on multiple factors: direct sunlight exposure (UV degrades collagen), ambient humidity levels, frequency of water contact, initial tanning quality. An alligator strap tends to last considerably longer due to its more resilient fibril structure. The patina that develops over time is not deterioration, but natural aesthetic evolution of leather. To extend longevity, rotate between different straps periodically and store unused pieces in a dry environment.