Strap for Legend Diver 36 Stainless Steel / MOP / Strap

The lug width of the Longines Legend Diver L3.374.4.80.0 is 19 millimetres. This measurement represents the distance between the inner edges of the case lugs and determines compatibility with aftermarket straps. It is important to verify this dimension before purchasing a strap, as even minor differences (for example, a 20mm strap) would result in imprecise fitment and undesired play. All straps offered by milanostraps.it for this model strictly adhere to the 19mm specification.

The ideal strap depends on intended use and aesthetic preference. To emphasize the diving heritage and austere elegance, we recommend alligator with vegetable tanning in dark brown or black tone: the fine texture naturally complements the instrument-like sobriety of the watch. For those seeking patina and longevity, shell cordovan is superior, developing character over time. If frequent water contact is anticipated, a vulcanised rubber strap maintains diving authenticity without compromise. For maximum versatility, a reinforced nylon NATO allows rapid changes and daily practicality whilst remaining coherent with the diving design.

Strap replacement requires two tools: a spring bar tool (small forked implement) and careful handling. Position the watch on a stable surface. Insert the tip of the spring bar tool into the small hole present on one of the case lugs, pressing lightly to extract the internal spring that supports the lug. Once one side is freed, remove the lug from the strap. Repeat the operation on the other side. Prepare the new strap by inserting the lugs one at a time into the slots, ensuring that the springs lock correctly and the lug is properly centred. Verify that the strap is not twisted. If you prefer to avoid DIY, the Casati Milano atelier offers strap-change service.

Yes, a 19mm aftermarket strap is fully compatible with the Longines Legend Diver L3.374.4.80.0, provided the lug width is respected. Longines uses universal standard lugs (spring bar), not proprietary fittings. Compatibility is therefore total with any quality strap manufactured for the 19mm size. The only precaution is to verify that the total strap length (from buckle or deployante to tip) is appropriate for your wrist measurements. milanostraps.it allows customisation in length to guarantee optimal comfort. The 18-month warranty on Casati Milano straps covers any fitment defects as well.

The lifespan of a leather strap varies depending on material, maintenance and usage. A quality alligator or calf with vegetable tanning typically lasts 3–5 years under regular use (worn 4–5 days per week) before replacement for natural wear. Shell cordovan, thanks to its denser structure, can last 5–7 years. If exposed to frequent moisture (baths, showers), lifespan reduces: we recommend removing the watch in these contexts. Preventative maintenance – applying protective cream every six months, drying promptly if wet – significantly extends useful life. The Casati Milano atelier offers a restoration service for worn straps, regenerating the leather using traditional techniques.