Strap for Legend Diver Date / Rubber

The lug width of the Longines Legend Diver L3.674.4.50.9 is 22mm. This dimension is determined by the proportional relationship between the 42mm case diameter and the geometry of the lugs. Always verify the internal width of the spring bar seat before purchasing an aftermarket strap to ensure correct fitment of the spring bar.

The ideal strap depends on intended use. For heritage narrative and versatility, vegetable-tanned Tuscan leather in vintage brown or vegetable-tanned alligator are excellent choices: they develop elegant patina and resist moisture. For recreational diving, nylon NATO or FKM rubber ensure practicality and rapid drying without structural compromise. The choice is personal, but must respect the 22mm lug width specification.

To change the strap, you must remove the spring bars—the small pins that secure the lugs to the case. Use a spring bar tool or thin flat implement to gently compress the spring and slide the shaft out of the lugs. Insert the new 22mm strap by aligning the holes with the lugs, then reposition the spring bar by compressing the spring until it seats firmly. Verify secure attachment before wearing the watch.

Yes, many aftermarket straps are compatible provided they respect the 22mm lug width specification. On milanostraps.it you will find a curated selection of leather, alligator, calf, rubber and NATO straps specifically calibrated for this width. Straps are customizable in length, initials and stitching thread, with 18-month warranty if handcrafted by the Casati Milano atelier.

Leather strap longevity depends on usage, maintenance and material quality. Premium vegetable-tanned leather offers 2-3 years of daily wear before replacement, developing pleasant patina during this period. First-grade alligator and calf guarantee 3-5 years. Lifespan extends if the strap is not exposed to constant moisture and is regularly cleaned. Rubber or NATO straps last longer in aquatic environments, requiring replacement every 4-6 years depending on intensity of use.