Rolex
Sea-Dweller 1665— lug 20mm

The Rolex Sea-Dweller 1665 features 20mm lugs. This lug width remained consistent throughout the reference's entire production run, from 1967 to 1980. When replacing the strap, a 20mm attachment width at the lugs is required, ideally tapering to 16mm at the buckle end.

For the Sea-Dweller 1665, the most suitable materials are smooth-grain calf leather or alligator leather in black or dark brown, which complement the technical character of the case without overwhelming it. Alternatively, a ballistic nylon NATO strap or a vulcanised rubber strap pays homage to the reference's original diving vocation. The choice ultimately depends on intended use: daily wear or occasional.

To replace the strap on the Sea-Dweller 1665, the spring bars connecting the strap to the case lugs must be removed using a dedicated spring bar tool or a fork-tip lever tool. Insert the new spring bar into the first strap lug end, compress it, and engage it into the case lug. Care should be taken to avoid scratching the polished steel lugs during the operation.

Yes. Any strap with a 20mm attachment width is technically compatible with the Sea-Dweller 1665. Milano Straps offers a curated selection of handcrafted 20mm straps specifically compatible with this reference, available in various materials and finishes. It is advisable to also verify the end tip shape (straight or curved) to ensure the best fit against the Oyster case lugs.

The lifespan of a leather strap depends on leather quality, tanning method, and daily use. A vegetable-tanned calf leather strap of artisanal quality, kept away from water and humidity, typically lasts 2 to 4 years with regular use. High-grade alligator straps, owing to their denser and more resilient leather, can last 5 to 7 years. Milano Straps products carry an 18-month warranty against manufacturing defects.