Strap for Master Collection Date 47.5

The lug width is precisely 25mm. This is a non-standard dimension requiring purpose-built straps. To verify, measure the distance between the lugs using a digital calliper—do not estimate visually. Straps sized at 20mm or 22mm are incompatible.

Alligator represents the apex choice for a watch with generous proportions (47.50mm case diameter). If you prefer European leathers, vegetable-tanned calf develops characteristic patina over time. For sporting contexts, heavyweight cotton NATO maintains authentic chronograph heritage. Avoid economy synthetics: the L2.689.4.51.5 deserves material coherence.

Remove the spring bars securing the strap to the case using a spring bar tool. Insert the tool vertically beneath the bar, gently levering to release the internal spring. Repeat on the opposite side. Next, align the new strap holes with the spring bar ends and carefully insert the bars back into the lugs. The operation requires approximately 5 minutes with correct tools.

Yes, provided the strap is manufactured for 25mm lug width. Always verify compatibility with the seller before purchase. Artisanal straps from specialist ateliers guarantee superior construction quality and longevity comparable to OEM Longines straps. Avoid generic straps without explicit lug width specification.

A quality natural leather strap (alligator or vegetable-tanned calf) typically lasts 3-5 years in daily use, depending on climate, humidity, and frequency of wear. Vegetable tanning develops pleasing patina, extending aesthetic life. To prolong longevity, apply conditioning balm every 6 months and dry immediately after water exposure. Artisanal straps permit localised repairs (clasp replacement, restitching) that extend utility beyond premature failure.