Strap for Master Collection 38.5 Day Date Stainless Steel / Silver-Arabic / Alligator

The lug width of the Longines Master Collection L2.755.4.78.3 is 20mm. This measurement refers to the internal distance between the two spring bar lugs on the case. To verify it, use a digital calliper positioned horizontally between the two lateral lugs where the strap is inserted.

The best strap depends on your daily usage. For formal elegance, we recommend alligator or vegetable-tanned calf leather in brown or black tones. For sporting versatility, a quality rubber strap maintains the technical legibility of the watch. A solid steel bracelet enhances the formal purity of the Master collection.

Use a spring bar tool to extract the spring bar lugs from the case. Position the tool in the small lateral groove of the lug, gently press to release the pin, then remove the old strap. Insert the new strap by aligning the holes with the lugs and press until you feel the pin snap into position. Verify that both lugs are securely fixed.

Yes, a quality aftermarket strap with 20mm lug width is fully compatible. Ensure the material (alligator, calf, rubber) has adequate thickness for proper fit. Milanostraps offers customisable straps already tested on this model, with size and stitching thread options available upon request.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3-5 years with moderate daily wear. Longevity depends on humidity exposure, frequency of wear, and maintenance care. Atelier Casati Milano offers an 18-month warranty on bespoke straps, and refurbishment services are available to extend strap life through professional reconditioning.