Strap for Master Collection Date 36 Stainless Steel MOP

The lug width of the Longines Master Collection L2.518.4.88.2 is precisely 19 millimetres. This dimension, measured from the inner wall of one lug to the other, is specific to this 36mm model and does not correspond to industrial standards. A 20mm strap would fit loosely, whilst an 18mm strap would not pass correctly. Therefore, it is essential to verify that any purchased strap is calibrated for 19mm compatibility.

For the Master Collection 36mm in brushed steel, we recommend an aniline alligator in dark brown or a vegetable-tanned calf in cognac or bordeaux tones. These choices emphasise the proportional balance and elegant vocation of the case. For daily wear or summer season, a NATO in navy blue with a subtle stripe or medium brown alligator offer versatility without aesthetic compromise. Brushed black rubber serves those seeking resilience and chromatic minimalism.

Strap replacement is executed by removing the spring bars connecting the lugs to the case. Utilise a dedicated spring bar tool to compress the pin, extract it laterally, and separate the strap. Insert the new strap by aligning the lug holes, then compress the spring bar into position, verifying that it is securely fixed. For precision operations, particularly with precious materials, professional watchmaker assistance is recommended.

The original Longines strap is supplied with specifications identical to the case, guaranteeing certified compatibility. A high-quality aftermarket strap, provided it is calibrated for 19mm, can match or exceed the original in artisanal craftsmanship, leather selection, and finishing. Milano Straps offers aftermarket straps in alligator, calf, and selected textiles, customisable in length, initials, and thread colour, with an 18-month warranty.

The lifespan of a leather strap depends on tanning method and usage patterns. A quality alligator or calf, worn daily, offers 5–8 years of serviceable life with progressive natural patina. Shell cordovan, an exceptionally noble material, can endure 10–15 years. Exposure to moisture, perspiration, and direct sunlight accelerates ageing. Regular maintenance—annual conditioning, protection from rain—significantly extends longevity. Bespoke straps from Casati Milano benefit from an 18-month structural warranty.