Strap for Divers Sixty-Five 40 Social Club Edition / Puerto Rico

The lug width is 20 millimetres. This standard width, typical of 1960s dive watches, represents the perfect balance between case rigidity and compatibility with a wide range of bespoke straps. To verify this measurement, measure the perpendicular space between the spring bar pins that connect the strap to the case, from the inner edge of one lug to the other.

The optimal strap depends on intended use. For formal contexts, a cognac alligator or vegetable-tanned leather in black emphasises the model's classical severity. For everyday wear and versatility, grey NATO straps in nylon offer ease of change and practicality. For those who appreciate historical authenticity, a black vulcanised rubber strap recreates the technical character of professional 1960s dive watches.

The strap is changed by removing the spring bar pins from the watch lugs using a dedicated tool (spring bar tool). Position the watch in a soft vice or on a stable support, gently push the pin inward to release the spring, extract the pin and slide the old strap away from the lugs. Repeat the operation on the opposite side. Install the new strap by reversing the process, ensuring the pins are firmly secured to the lugs.

Yes, numerous bespoke-quality aftermarket straps are available compatible with the 20-millimetre lug width of the Divers 65. At Milano Straps you can find straps in alligator, shell cordovan, vegetable-tanned leather, NATO nylon and vulcanised rubber, all constructed to fit perfectly the lugs of this model. Each strap is available in various colour options to completely personalise your watch.

The lifespan of a leather strap depends on use, care and material. Quality vegetable-tanned alligator typically resists 5-7 years of daily wear, provided the leather is protected from excessive moisture and direct sunlight. Shell cordovan, thanks to its natural density, can last even 7-10 years. More delicate calf leather requires greater attention and typically lasts 4-6 years. NATO nylon straps last practically indefinitely if kept clean. Vulcanised rubber, whilst durable, tends to stiffen after 3-5 years of sun exposure.