Strap for Divers Sixty-Five 40 Stainless Steel / Deauville Blue / Bracelet

The lug width of this model is 20 mm. This measurement is taken from the inside of one lug to the inside of the opposite lug. To verify correctly, position a ruler or digital calliper between the lugs on the terminal side of the case, excluding the material thickness itself. A 20 mm lug width allows compatibility with a vast range of artisanal straps, from Italian leather to technical fabrics.

The choice depends on usage and aesthetic preferences. For formal elegance and urban settings: alligator with vegetable tanning. For vintage and sports styling: brown aged calfskin or shell cordovan. For technical or diving use: NATO strap in high-tenacity polyamide or FKM rubber. Pearl grey alligator pairs beautifully with black dials, whilst dark brown calf enhances navy blue dials. The choice of lugs, buckles and keepers must always maintain material coherence with the stainless steel case.

Strap changing is a straightforward operation. Obtain a spring bar tool or small lever. Position the watch face-down on a soft surface. Insert the lever under the spring bar (the small metal spring supporting the strap) from one side, gently push inward toward the case and the strap end will slide out easily. Repeat on the other side. To fit the new strap, thread one end under the spring bar, compress the spring slightly and insert the other end. Ensure both sides are positioned symmetrically.

Any strap with a 20 mm lug width is compatible with this model. On milanostraps.it you will find a curated selection of artisanal leather straps (alligator, calf, shell cordovan), technical NATO fabrics, and rubber, all available in 20 mm width. Always verify that strap thickness is proportionate to the 40 mm case: generally, a thickness between 3.5 and 4.5 mm is optimal. If the strap features a deployant buckle (folding clasp), ensure the clasp width matches the 20 mm lug width.

Durability depends on tanning quality and intensity of use. A natural leather strap with vegetable tanning (alligator, calf, shell cordovan), correctly maintained, lasts typically 3–5 years with daily wear. Leather dislikes prolonged moisture and direct UV rays: always dry the strap after immersion or shower use, and store away from direct sunlight. Avoid applying creams or oils not specifically formulated for watchstrap leather. With proper maintenance, a shell cordovan strap may last 7–8 years or longer, developing a patina that increases aesthetic value. Rubber or NATO straps offer superior longevity in wet environments, though they still require regular freshwater cleaning.