Strap for GrandeVitesse Tachymeter Strap

The Longines GrandeVitesse L3.636.4.50.2 features a 20-millimetre lug width, proportioned to the 42mm case diameter. This specification ensures secure attachment between strap and case lugs. Measure the distance between the two metal pins to verify exact compatibility with your watch.

The optimal choice depends on wear context and aesthetic preference. Mississippi alligator in dark brown tones offers sophistication and chromatic evolution. Vegetable-tanned calf leather provides tactile warmth and personalisation over time. Heavy-cotton NATO delivers practicality and sportive character. All these materials in 20mm coordinate coherently with the brushed stainless-steel case of the GrandeVitesse.

Use a spring bar tool to gently push the small metal pins toward the case body. Once released, the old strap disengages from the lug. Align the new strap holes with the lugs and press the pin until you hear or feel a secure click. Verify stability before wearing. If uncertain, consult a professional watchmaker.

Yes, the GrandeVitesse accepts any quality strap manufactured to 20mm specification. Artisanal straps in alligator, calf, shell cordovan and other noble materials fit the lugs perfectly. Ensure the strap is designed specifically for 20mm lugs to avoid slippage. Atelier Casati Milano and our online partners curate selections for this width.

Durability depends on material and daily usage. Premium alligator with vegetable tanning lasts 5–8 years with regular maintenance. Chrome-tanned calf averages 3–5 years. Technical NATO material resists 4–6 years. Sun exposure, humidity and perspiration accelerate wear. Periodic cleaning with soft cloth and occasional conditioning with specialist creams extend strap lifespan significantly.