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

The Rolex Datejust 31 278344RBR-0007 has a lug width of 16 mm. This measurement is taken as the internal distance between the two lugs of the Oyster case using a digital calliper. It is specific to this 31 mm reference and differs from the 36 mm and 41 mm Datejust variants, which feature 20 mm lug widths.

For the Datejust 31 278344RBR-0007, with its white gold and diamond bezel, a vegetable-tanned alligator strap with carrée grain is the most coherent choice: its elegant profile and the natural patina it develops over time complement the case's refined character. A smooth polished calf leather strap suits professional settings, while vulcanised rubber offers a practical solution for everyday sporting wear.

Changing the strap on a Datejust 31 requires a spring bar tool inserted into the lug notches to compress and release the spring bars holding the strap in place. Care must be taken to avoid scratching the white gold case — using a protective pad is strongly recommended. The standard Rolex 16 mm spring bars can be reused or replaced with quality aftermarket equivalents. If in doubt, consult a watchmaker.

Yes. The Datejust 31 278344RBR-0007 features straight (non-curved) lugs of 16 mm, a standard geometry compatible with the vast majority of aftermarket artisan straps made to this width. Ensure the strap has a flat-ended tip rather than a curved one, and check the total length: for typical female wrists, dimensions of approximately 105/65 mm (short/long taper) are recommended. Milanostraps.it offers a dedicated selection for 16 mm lug width.

The lifespan of a leather strap depends on tanning quality, frequency of use, and exposure to perspiration and moisture. A high-quality vegetable-tanned alligator strap, worn daily with proper care — drying after each use and rotating between straps — can last between 3 and 6 years while developing a desirable patina. Smooth calf leather typically lasts 2 to 4 years but offers excellent value. Milanostraps provides an 18-month manufacturing defect guarantee on all straps.