Strap for GrandeVitesse Tachymeter

The lug width of the Longines GrandeVitesse L3.636.4.50.0 is 20mm. This dimension is fixed and represents the distance between the two attachment points of the strap on the case lugs. It is a specific construction specification for this model, requiring dedicated straps to ensure correct fit without lateral play.

For the GrandeVitesse L3.636.4.50.0, we recommend straps in alligator or vegetable-tanned calf leather: they maintain the balance between elegance and the watch's technical vocation. Cognac-coloured alligator creates fascinating contrast with the steel, whilst black calf offers formal versatility. For sports use, high-density fabric NATO or FKM rubber are functional choices without compromises in strength.

The GrandeVitesse L3.636.4.50.0 is fitted with standard spring bars: remove the bar by pushing it laterally with an appropriate tool (spring bar tool), extract the old strap, insert the new one by aligning the holes with the bar, then push the bar into the lugs until it clicks into position. This operation requires care to avoid scratching the case.

Yes, provided the strap is specifically constructed for 20mm lug width. Artisanal straps in vegetable-tanned leather or canvas are fully compatible: they offer superior quality compared to original replacement straps, with better natural patina development and increased structural durability. Always verify lug width before purchase.

A quality leather strap constructed in vegetable-tanned leather, with regular use (4–5 days per week), maintains structural integrity for 3–5 years. The patina developed over time adds aesthetic character. When rotating between multiple straps, lifespan extends significantly. The standard warranty for artisanal straps is 18 months, covering manufacturing defects and initial workmanship.