Strap for Heritage Legend Diver 39 Stainless Steel / Blue / Rubber

The Longines Legend Diver L3.764.4.90.9 features a 20-millimetre lug width. This dimension is measured between the inner surfaces of the two lugs that extend from the case. Ensure any strap you purchase is specifically sized for 20 mm lugs to guarantee compatibility and secure wear.

The ideal strap depends on your lifestyle and intended use. For formal occasions, we recommend alligator or vegetable-tanned calf leather, which develop a remarkable patina over time. For sports and water activities, shell cordovan, FKM rubber, or NATO weave offer practicality and moisture resistance. All must be compatible with the 20 mm lug width.

To change the strap, obtain a spring bar tool. Insert the tool under the pin that supports the old strap, press to release the internal spring, and withdraw the pin. Repeat on the other side. Insert the new strap by positioning the pins into their respective openings until they click into place. If unsure, consult a qualified watchmaker.

Yes, the Longines Legend Diver L3.764.4.90.9 is fully compatible with quality aftermarket straps, provided they feature the correct 20 mm lug width. Our bespoke straps from Milano Straps are specifically engineered for sports and dive watches like this model, guaranteeing premium materials and professional finishing.

Strap longevity depends on material and usage patterns. Vegetable-tanned leather typically lasts 3–5 years with daily wear, developing a beautiful patina. Alligator or shell cordovan can last 7–10 years. Frequent exposure to salt water shortens these timespans; rotating between multiple straps and regular cleaning is advisable.