Strap for Datejust 31 Stainless Steel Fluted / Jubilee / MOP

The Rolex Datejust 31 ref. 278274-0006 has a lug width of 16mm. This measurement should be taken with a digital calliper between the two lugs at the point where they meet the case, to ensure correct strap compatibility and precise spring bar fitment.

For a mother-of-pearl dial paired with a white gold and Oystersteel case, a porosus alligator strap in dark brown or anthracite grey offers the most coherent aesthetic. The regular belly grain of alligator enhances the dial's iridescence. Alternatively, a vegetable-tanned calf leather strap in a polished finish provides everyday versatility, developing a personal patina over time.

Replacing the strap requires a lever-type spring bar tool or a precision spring bar tool with a 1.0–1.2mm tip to remove the spring bars housed within the lugs. It is advisable to work on a watch cushion to prevent scratching the case. For the original Oyster or Jubilee bracelets, the clasp mechanism uses screws and requires a dedicated screwdriver.

Yes. Any strap with a 16mm attachment width and standard spring bars is technically compatible. To ensure material quality befitting a timepiece of this calibre, it is advisable to choose artisan manufacturers who specify lug machining tolerances (±0.1mm). Milanostraps.it offers a range of 16mm straps crafted specifically for this measurement.

Longevity depends on the material and maintenance. A quality alligator strap, worn daily but rotated with at least one other strap, retains its structural and aesthetic integrity for 2–4 years. Vegetable-tanned calf leather, with periodic application of leather conditioner and protection from moisture, has a similar lifespan. Systematic exposure to water is the primary factor in premature degradation of both stitching and the strap body.