Rolex
Oyster Perpetual 31 177200-0017— lug 17mm

The lug width of the Rolex Oyster Perpetual 31 reference 177200-0017 is 16mm. This measurement should be taken with a digital calliper between the two lugs at the point where they meet the case, and is the essential parameter for selecting a compatible strap.

For a 31mm case with a pink sunray dial, the most suitable straps are alligator in bordeaux or black for formal occasions, vegetable-tanned calfskin for everyday wear, and NATO nylon for summer use. All straps must feature a 16mm lug width. A deployant clasp is recommended for leather straps to preserve the leather and improve wrist fit.

Strap replacement requires a fine-tipped spring bar tool inserted into the slot between the lug and the strap to compress the spring bars. It is advisable to work on a soft cushion to avoid scratching the case. If unfamiliar with the procedure, it is best to entrust the operation to a watchmaker or visit the Casati Milano atelier.

Yes. Any strap with a 16mm lug width and standard spring bars is compatible with this model. Milano Straps offers a selection of handcrafted leather, rubber and NATO straps specifically sized for the 16mm lug of the Rolex Oyster Perpetual 31.

A quality leather strap — alligator or vegetable-tanned calfskin — typically lasts between two and four years with daily wear, depending on care and exposure to perspiration and moisture. Regular conditioning with appropriate leather creams and rotating between multiple straps will significantly extend its lifespan.