Strap for Heritage Legend Diver 39 Stainless Steel / Black / Leather Strap

The Longines Legend Diver L3.764.4.50.0 features a 20-millimetre lug width, which refers to the space between the two lugs on the case. This measurement is critical when selecting a compatible strap. To verify, use a calliper positioned perpendicular to the wrist, measuring from one lug to the opposite lug.

For this stainless steel model with professional diving heritage, three primary options are recommended: genuine alligator (refined patina development), smooth calf leather (understated formality), or NATO/rubber (sports practicality). milanostraps.it offers a complete 20mm strap catalogue with premium materials and bespoke customisation through Casati Milano atelier.

Remove the old strap using a springbar tool—a small instrument that compresses the spring-loaded pins. Insert the flat tip under the pin on one side, compress the internal spring, and extract the pin. Repeat on the opposite side. Insert the new strap's pins through the case lugs, ensuring they lock completely. Verify the strap sits flush without misalignment.

Yes, provided the strap has a 20-millimetre lug width. The Longines L3.764.4.50.0 is compatible with any strap of this measurement, regardless of brand. milanostraps.it offers artisanal straps of exceptional quality, with customisation available through Casati Milano atelier and up to 18 months warranty.

Leather strap lifespan depends on usage and maintenance: under normal conditions (3–5 days per week, protection from excessive humidity), premium leather such as alligator or calf lasts 2–4 years. Daily wear or frequent moisture exposure reduces durability. milanostraps straps feature artisanal leather and reinforced stitching, extending longevity. To maximise lifespan, avoid repeated diving with leather straps and periodically apply appropriate conditioner.