Strap for GrandeVitesse Tachymeter Brown Bracelet

The lug width (lug measure) of the Longines GrandeVitesse L3.636.4.60.6 is 20mm. This measurement, determined by the distance between the two spring bar pins of the case, represents an uncommon dimension in the contemporary watchmaking landscape. Measuring it correctly with a digital calliper perpendicular to the internal face of the case is essential for identifying compatible straps.

For the Longines GrandeVitesse L3.636.4.60.6, authentic alligator is the most coherent choice from an aesthetic and structural perspective. Alligator acquires lustre over time whilst maintaining rigidity, dialoguing perfectly with the brushed stainless steel case. Excellent alternatives include brushed calf for contemporary chromatic continuity, shell cordovan for deep burgundy patina, or natural rubber for informal and aquatic contexts.

To change the strap, position the watch on a soft support with the dial facing downwards. Locate the spring bar pins (the small metal rods at the ends of the lug). Use a spring bar tool (or appropriate implement) to press inwards the small retention pin located on the internal side of each pin, thereby releasing the lug from the case. Repeat the operation on the other side, carefully extract the old lug, position the new strap by aligning the pins, and press until the retention click is audible.

Yes, any artisanal strap with a 20mm lug width is compatible with the GrandeVitesse L3.636.4.60.6, irrespective of the manufacturer. Compatibility is guaranteed by the standardisation of lug width. Always verify the exact measurement by checking it physically with a digital calliper. MilanoStraps offers a specialised collection of 20mm straps with personalisation options: choice of leathers, width, and stitching thread thickness.

The lifespan of a leather strap depends on the tanning method and usage patterns. A strap made with vegetable tanning, manufactured through long tanning cycles with natural tannins, maintains structural integrity for 4–7 years of daily wear, acquiring aesthetic patina in the process. Alligator, owing to its more robust fibrous structure, can endure 8–10 years. Natural vulcanised rubber offers greater durability (10+ years) in humid or aquatic environments. Casati Milano provides an 18-month warranty on all personalised straps.