Strap for La Grande Classique Automatic 38 Stainless Steel / Blue - Roman

The lug width of the L4.918.4.94.2 is 20 millimetres. This measurement is taken from the inside tip of the spring bar between the two lug holes. It is a non-standard size, specifically engineered by Longines for this model, requiring dedicated straps incompatible with watches using 18 or 22 millimetre lugs.

Alligator leather is the most coherent choice with this model's classical identity: the deep, regular grain amplifies the geometric lines of the white dial. Alternatively, textured calf with vegetable tanning offers versatility and develops an elegant patina over time. For a sportier approach, calf with structured rubber maintains the design's sobriety.

The strap is replaced using a dedicated spring bar tool. Position it under the spring bar from the opposite side, pressing gently downward to apply leverage: the spring will release, freeing the strap end. Repeat from the other lug. Insert the spring into the new strap and secure both ends to the lug holes. Avoid forcing: the spring should disengage smoothly upon contact with the slots.

Any strap with a 20 millimetre lug width is compatible. milanostraps.it offers a dedicated collection of 20mm straps in various leathers—alligator, calf, crocodile, rubber and fabric—with personalisation options for length, buckle type and stitching thread. The Casati Milano atelier also offers bespoke strap creation with personal consultation.

A quality leather strap, worn daily, typically lasts 3–5 years. Alligator and crocodile, due to their denser fibrous structure, resist wear longer than calf. Longevity depends on usage: daily wear in humid climates accelerates strap degradation. Vegetable-tanned leather develops an elegant patina without deteriorating, though the metal buckle wears before the leather. A strap worn primarily for formal occasions or in dry climates can last 7–10 years.