Rolex
Datejust 31 278288rbr-0003— lug 16mm

The lug width of the Datejust 31 reference 278288rbr-0003 is 16 millimetres. This measurement is determined by the proportion between the lugs of the 31mm yellow gold case and the structure of the fluted bezel. Always verify the lug width with a calliper before purchasing an aftermarket strap to ensure perfect fit between the lugs.

For the 278288rbr-0003 in yellow gold with a jewelled dial, the ideal materials are alligator in dark tones (black, cognac, burgundy) and calf leather with vegetable tanning and natural patina. Alligator emphasises the grain of the gold, whilst calf offers a patina that ages beautifully. Shell cordovan represents an exceptional choice for those seeking additional visual depth. Avoid synthetics and excessively casual materials.

To change the strap on a Datejust 31, you must access the lugs using specific small tools (spring bar tool). Release the elastic pin that secures the strap at one end of the lug, remove the old strap, align the holes of the new strap and reinsert the elastic pin. It is advisable to perform this operation at an authorised Rolex service centre or with an experienced watchmaker to avoid damage to the case or gold ornaments.

Yes, any strap with a 16mm lug width is compatible with the 278288rbr-0003, provided it features standard lugs. Artisanal straps of quality such as those from Milano Straps offer superior materials (alligator, cordovan, calf) and customisable finishes. However, it is important to verify that the strap's spallina (the part that slides under the lug) is designed not to touch the yellow gold case, to avoid micro-scratches.

The lifespan of a leather strap depends on frequency of use, exposure to moisture and the type of tanning. A quality alligator strap such as those crafted by Milano Straps, with ordinary care, lasts 3–5 years of regular wear before requiring replacement. Vegetable-tanned calf typically lasts 2–4 years. Shell cordovan, being more resistant, can exceed 5 years. Periodic maintenance (cleaning and conditioning with specific creams) significantly extends the strap's lifespan.