Hamilton
Jazzmaster H32315111— lug 18mm

The lug width of the H32315111 is 18 millimetres, measured from the inner base of one lug to the inner base of the opposite lug. This specification is critical when selecting a strap: adapting 20mm or 16mm straps will compromise both aesthetics and case stability on the wrist.

The ideal strap depends on intended use: for formal elegance, we recommend cocoa-brown alligator or cognac vegetable-tanned calf. For daily versatility, a steel-grey NATO or naturally aged calf. For urban-sport contexts, charcoal-grey rubber ensures comfort and modern appeal. In all cases, 18mm width is mandatory.

Remove the watch from your wrist. Using a spring bar tool, insert the thin tip beneath the lower lug, compressing the internal spring. Extract the pin. Repeat on the upper lug. Insert the new 18mm strap pins through the slots, ensuring the springs click securely. If uncertain, consult a qualified watchmaker or jeweller.

Yes, provided they meet the 18mm specification and are constructed to high standards: stainless steel lug attachments, quality leather or technical material, precise finishing. Artisanal 18mm straps in alligator, calf, or vegetable-tanned leather offer guaranteed compatibility and superior build quality compared to mass-market alternatives.

A quality leather strap, such as alligator or vegetable-tanned calf, has an average lifespan of 3-5 years with daily wear, accounting for degradation from perspiration, moisture, and mechanical stress. Natural patina develops during the first 12-18 months; thereafter, deterioration rate depends on maintenance, climate, and wearing frequency. Vegetable-tanned leather ages more elegantly than synthetic or lacquered alternatives.