Strap for Divers Sixty-Five 40 Stainless Steel / Black / Textile

The lug width is 20 millimetres. This measurement represents the distance between the watch lugs where the strap is fitted. To verify compatibility, measure the horizontal distance between the two lugs; the value should be between 19.8 and 20.2mm to ensure a proper fit without lateral play that could damage the lugs.

The best strap depends on your intended use. To preserve the vintage diving character, an alligator leather with vegetable tanning in dark brown or shell cordovan in burgundy emphasise the instrument's historical identity. For marine or humid environments, vulcanised FKM rubber in black ensures excellent grip when wet. Cotton NATO in robust weave remains the most versatile solution, allowing swift transitions between formal and casual styles.

Changing the strap requires a dedicated spring bar tool. Position the flat end of the tool beneath the lug pin, apply pressure until the old strap releases, align the new strap holes with the lugs, and release the spring so it reseats fully. This is a delicate operation but not complex; avoid forcing to prevent scratching the stainless steel case.

Yes, any strap with a 20mm lug width is compatible. Milano Straps offers a curated selection in leather (alligator, shell cordovan, calf), robust cotton NATO and vulcanised rubber, all hand-crafted and tested for precise tolerances. Compatibility is guaranteed by ISO standard technical specifications.

Durability depends on frequency of use and environmental exposure. An alligator or shell cordovan strap with vegetable tanning, worn daily in dry conditions, maintains structural integrity for 4–6 years. Regular exposure to salt water, perspiration and humidity reduces lifespan to 2–3 years. It is essential to allow the strap to dry completely after water contact and apply protective treatments (natural waxes) every 6–8 months to slow fibre deterioration.