Strap for Master Collection 40 Date Pink Gold / 190 Years

The lug width of the Longines Master Collection L2.793.8.73.2 is precisely 21mm, measured as the internal distance between the pins connecting the strap to the case lugs. This specification tolerates no approximation: a 20mm strap will be loose, a 22mm strap will be incompatible. Measurement requires a precision calliper to 0.1mm or professional guidance before purchase.

Alligator leather with vegetable tanning is the structural choice for rose gold 40mm: natural geometric pattern, tactile softness, and capacity to develop patina in harmony with the precious case over time. Vegetable-tanned calf is an alternative for uniform grain and deep black finish. Shell cordovan is a restricted choice for specular patina development, but requires conscious maintenance.

Strap change requires extraction of the connecting pins using a dedicated tool (spring bar tool, often supplied with the watch). Position the case on a stable surface, locate the pins from the lugs, insert the tool's tip into the pin hole and apply controlled pressure until the pin releases. Remove the old strap, insert the new one by aligning internal passages with the pins, then reinsert the pins with uniform pressure until a click indicates secure seating. Avoid excessive pressure that could scratch the rose gold.

Yes, any artisanal strap with certified 21mm lug width is compatible. The specification is universal among manufacturers respecting construction tolerance. Verification that the strap is precision-manufactured and internal passages are correctly dimensioned is important. Milanostraps.it supplies personalised 21mm straps, tested for compatibility with this model.

A quality artisanal strap in alligator or calf, with vegetable tanning and ordinary maintenance, maintains structural integrity for 4–6 years of daily wear. Patina develops progressively, improving aesthetics. The rose gold deployante buckle requires occasional mechanical inspection. Avoiding prolonged direct moisture exposure (shower, sea) significantly extends durability. Casati Milano's guarantee covers construction defects for 18 months.