Strap for Master Collection Date 38.5 Stainless Steel Black

The lug width of the Longines Master Collection L2.628.4.51.7 is 20 mm. This measurement is the standard specification for this reference and is essential to ensure that any aftermarket strap fits the case correctly. To verify it, place a digital calliper between the two lugs parallel to the dial: the value should fall between 19.8 and 20.2 mm.

For the L2.628.4.51.7, the ideal choice is a satin-finished alligator strap or vegetable-tanned calf leather. Black or burgundy alligator creates a sober dialogue with the stainless steel case and applied gold details on the dial. Patinable calf offers versatility and develops character with use, naturally transforming into an amber tone over time. For those seeking absolute formality, cognac shell cordovan represents the most sophisticated solution.

To change the strap on the L2.628.4.51.7, position the watch with the strap facing downward and locate the spring bars at each end of the case. Use a strap removal tool or a fine pin: insert it into the bar's end to compress the internal spring, then pull the bar from its seat. Repeat the procedure from the other side. Finally, insert the bars into the holes of the new strap's lug and, whilst compressing the spring, position the bar in the case until you hear the locking click.

Yes, any artisanal strap with a 20 mm lug width is fully compatible with the L2.628.4.51.7. Milanostraps.it offers a comprehensive selection of 20 mm straps in various leathers (alligator, vegetable-tanned calf, shell cordovan, rubber, canvas) and customisable to your preferences. The important thing is to verify that the lug width is precisely 20 mm and that the total length is suitable for your wrist circumference.

The lifespan of an artisanal leather strap varies depending on the material and usage. A quality satin-finished alligator, with daily wear, guarantees 4–6 years before showing significant signs of wear. Vegetable-tanned calf, thanks to its patinable capacity, maintains better aesthetics even after 5–7 years of constant use, as natural patina conceals minor creases. Shell cordovan, due to its density, can exceed 7–10 years under normal conditions. Casati Milano provides an 18-month warranty on all bespoke straps.