Strap for Railroad 42 Small Second Auto Stainless Steel / Black / Bracelet

The H40515131 features a 22-millimetre lug width. This measurement is critical for selecting compatible straps and must be measured from the inside of one lug to the inside of the other. The 22mm specification ensures broad availability within our collection whilst maintaining proportional balance on the 42mm case.

Tuscan vegetable-tanned leather in warm cognac is the historically authentic choice and our primary recommendation: vegetable tanning develops noble patina over years, amplifying the timepiece's industrial character. Alternatively, vegetable-tanned alligator offers pronounced grain texture, or a French canvas NATO for purist ferroviaire functionality.

Strap replacement is straightforward: use a spring bar tool or blunt knife point. Insert the tool under the lug pin and lift gently until the pin retracts, then remove the old strap. Install the new strap by inserting the pins into their seats and verifying they click securely on both sides.

Any strap with 22mm lugs is compatible. Options encompass leather (vegetable-tanned, alligator, cordovan, calf), textile NATOs, butyl rubber straps, and even metal bracelets fitted with 22mm lugs. We recommend selecting straps at least 18mm overall width to maintain proportional harmony on the 42mm case.

A strap in Tuscan vegetable-tanned leather typically endures 12–18 months under intensive daily use, extending to 3–4 years with occasional wear. Longevity depends on: frequency of use, exposure to perspiration and humidity, and maintenance routines. Vegetable-tanned leather, unlike disposable industrial straps, permits regenerative treatments and develops personal patina that transforms wear into desirable ageing.