Strap for Datejust 31 Stainless Steel Domed Diamond / Oyster / Grey - Roman

The Rolex Datejust 31 ref. 278344rbr-0023 has a lug width of 16mm. This measurement is specific to the 31mm Datejust models and differs from the 20mm found on the Datejust 41 and the 19mm on the Datejust 36. Confirming this measurement before purchasing an aftermarket strap is essential to ensure a correct fit between the lugs without risk of damaging the white gold case.

For a white gold case with a diamond-set bezel such as the ref. 278344rbr-0023, the most suitable materials are Mississippiensis alligator in neutral tones (white, pearl grey, dark grey) and polished box-calf leather in black or bordeaux. Both complement the cool chromatic register of white gold without competing visually with the bezel's brilliance. A brushed steel deployant clasp completes the pairing with both elegance and practicality.

Changing the strap on a Datejust 31 requires a fine-tip springbar tool suited to the 16mm lug width. It is advisable to work on a soft watchmaker's cushion with the case face-down to avoid scratching the white gold lugs. Careful lateral pressure on the springbar tips releases the bar from its slot. If in doubt, Casati Milano's professional fitting service handles strap installation as part of the bespoke experience.

Yes. Milanostraps.it stocks a curated range of aftermarket straps with a 16mm lug width, fully compatible with the Rolex Datejust 31 ref. 278344rbr-0023. Options include alligator, box-calf, shell cordovan and vulcanised rubber, available either ready to ship online or fully bespoke through the Casati Milano atelier, where leather, stitching and lining can be specified to personal preference.

The lifespan of a leather strap depends on the material, maintenance routine and frequency of wear. A high-quality vegetable-tanned alligator strap, properly cared for, can last between three and seven years under regular use. Box-calf offers comparable durability but is more sensitive to moisture and perspiration. Casati Milano backs its straps with an 18-month manufacturing warranty and recommends avoiding prolonged exposure to water, sweat and direct UV light to preserve the leather's patina and structural integrity.