Strap for GrandeVitesse Chronograph 24h

The lug width of the Longines GrandeVitesse L3.637.4.50.0 is 22mm. This measurement is taken from the centre of one spring bar hole to the centre of the other, and it determines compatibility with aftermarket straps. It is important not to confuse lug width (22mm) with the total width of the strap at the wrist, which may vary depending on the specific strap design.

For the GrandeVitesse L3.637.4.50.0, we recommend vegetable-tanned Tuscan leather, which emphasises the watch's sporting and racing character whilst developing a mature patina over time. A polished black alligator is an elegant alternative for formal occasions, whilst rubber is ideal for technical everyday use. Cordovan in bordeaux represents the most sophisticated choice for those seeking predictable ageing and natural sheen.

To change the strap, you will need a spring bar tool (a specific tool for removing the attachment pins). Position the tool on the spring bar slot and apply gentle downward pressure to expand the internal spring, then remove the old strap. Align the new strap's spring bars with the lugs and insert them with a slight twisting motion until they click into place. Do not force the movement as this may damage the pins or case.

Any strap with a 22mm lug width is compatible with the Longines GrandeVitesse L3.637.4.50.0. You can choose from materials such as Tuscan vegetable-tanned leather, smooth calf, alligator, shell cordovan, rubber, and even woven NATO straps. Compatibility is guaranteed by the lug width: what matters is that the spring bars have standard diameter and the lug width is precisely 22mm.

A quality leather strap, with vegetable tanning or alligator, has an average lifespan of 3-5 years with intensive daily use, considering that leather naturally wears at the wrist bending point. Longevity depends on frequency of use, climatic conditions (humidity, direct sunlight) and maintenance. Rubber straps have a similar lifespan but different degradation. Casati Milano's atelier guarantees 18 months on bespoke straps, during which it offers free assistance for any adjustments.