Strap for Master Collection 41 Retrograde Moonphase Stainless Steel / Black Roman / Alligator

The Longines Master Collection L2.738.4.51.7 features 20mm lugs. This measurement represents the internal distance between the two metal pins of the case. Verify this dimension with a digital calliper before purchasing a compatible strap, as even minor discrepancies cause fitting issues.

The ideal strap depends on intended usage. For formal contexts, black or chocolate-brown alligator elevates the elegant character of the satin stainless-steel case. For daily wear, vegetable-tanned calf offers durability and natural patina development over time. Shell cordovan represents an intermediate solution with inherent luminosity. A grey-green NATO enables sportive-casual versatility.

Use a specialised spring-bar removal tool. Position it on the opposite side of the strap and gently push until the pin exits completely. Slide off the old strap. Insert the new strap, aligning the holes with the case lugs. Reintroduce the pin until it reaches the end of the slot. Avoid hammers or screwdrivers, which damage the lugs.

Yes, provided the lugs are precisely 20mm. Artisanal straps of superior quality to the standard issue allow complete personalisation of the watch. Always verify that the vendor specifies lug width and that the strap is available in the correct length for your wrist.

A quality leather strap (alligatore, calf or shell cordovan) typically lasts 3-5 years of daily use. Longevity depends on climate, body perspiration and maintenance. Vegetable-tanned leather ages rather than degrades, acquiring patina and character. Luxury artisanal straps with replaceable lugs can be regenerated, extending product lifespan.