Strap for Master Collection Date 34 Stainless Steel - Yellow Gold / MOP

The lug width of the Longines Master Collection L2.357.5.87.7 is 18mm. This measurement represents the distance between the two attachment points on the case where the strap connects. It is essential to verify this dimension with a digital calliper before ordering an aftermarket strap, as a measurement error would result in structural incompatibility with the case lugs.

The optimal strap depends on intended use and aesthetic preference. Black alligator leather with vegetable tanning and natural thread stitching represents the most versatile and conservative choice: its geometric grain pattern does not visually compete with the mother-of-pearl dial. Alternatively, brown cognac shell cordovan amplifies the chromatic dialogue with the yellow gold case, whilst grey stone vegetable-tanned leather offers a contemporary and neutral aesthetic.

Strap replacement requires a spring bar tool (a specialised device for removing lugs). Position the watch on a flat surface, insert the tool into the lateral slot of the lug to compress the internal spring, and simultaneously pull the strap outward. Repeat on the opposite lug. To install the new strap, align the holes with the pins and press until you hear the spring click into position. It is advisable to perform this operation on a soft surface (rubber mat) to prevent scratching the case.

Any strap with an 18mm lug width is compatible with the Longines L2.357.5.87.7, provided that the total strap thickness does not exceed 4mm in height beneath the case (a limit determined by case curvature). milanostraps.it offers a selection of straps in alligator, calf leather, shell cordovan and FKM rubber, all dimensioned and tested for this model. Casati Milano bespoke atelier creates custom straps with personalised leather selection, colour and stitching details.

Leather strap durability depends on usage patterns, maintenance and tanning method. Alligator or shell cordovan with vegetable tanning, subjected to correct maintenance (avoiding excessive moisture and dirt), typically lasts 4–6 years before visible signs of ageing appear. Vegetable-tanned calf leather generally lasts 3–5 years. With periodic care (cleaning with soft cloth, application of natural waxes), it is possible to extend strap lifespan to 8–10 years. Casati Milano straps, crafted from selected leathers, include an 18-month warranty and can be professionally regenerated through specialised restoration services.