Rolex
Datejust 31 178273-0057— lug 16mm

The lug width is 16 millimetres. This is the distance between the inner shoulders of the two lugs on the case. Any compatible strap must strictly respect this measurement to fit perfectly without forcing or play.

It depends on your use and style. For formal dress wear we recommend natural alligator or shell cordovan with vegetable tanning in dark brown. For daily versatility, naturally tanned calf leather. For modern contrast, a dense cotton NATO or sport FKM rubber. Your choice must reflect your wrist, not just the catalogue.

Remove the old strap by extracting the spring bars from the lugs using a dedicated tool or small flat-head screwdriver. Position the new strap by aligning the slots with the lug holes and reinsert the spring bars by tapping gently with a plastic hammer. If unsure, consult a professional: the lugs are precious and tolerate no errors.

Yes, if it respects exactly the 16-millimetre lug width. Many quality artisan straps (Italian, English, Swiss) are compatible. Always verify that the seller provides a compatibility guarantee and warranty against manufacturing defects. A quality Casati Milano strap comes with 18 months' warranty.

A premium vegetable-tanned leather strap lasts approximately 3-5 years with proper care: avoid prolonged moisture, apply natural balm every 6-12 months, and let it breathe when unworn. Shell cordovan and alligator resist longer. Poor-quality leather degrades within 1-2 years. Investing in craftsmanship preserves your Rolex.