Rolex
Datejust 31 278273-0016— lug 16mm

The lug width of the Rolex Datejust 31 ref. 278273-0016 is 16 mm. This measurement is taken internally between the two lugs of the Oyster case and determines compatibility with any aftermarket strap. It is advisable to verify this with a digital calliper to avoid measurement errors.

For the Datejust 31 278273-0016, with its yellow gold Rolesor case and silver dial, a polished alligator belly strap is the most formally coherent choice. For more versatile daily wear, vegetable-tanned calfskin in cognac or bordeaux tones complements the warm hues of the yellow gold effectively. The strap must have shaped 16 mm ends to fit correctly into the Oyster lugs.

To replace the strap on the Datejust 31, the spring bars must be removed using a dedicated spring bar tool with a forked tip. The bars are compressed laterally by applying leverage within the lug slot. Care must be taken to avoid scratching the steel case or the gold surfaces. If in doubt, it is advisable to consult a watchmaker or the Casati Milano atelier.

Yes. The Datejust 31 278273-0016 features standard 16 mm lugs, compatible with a wide range of artisan aftermarket straps. Milanostraps.it offers a curated selection of 16mm straps in alligator, calfskin, shell cordovan, rubber and NATO, all crafted with shaped ends suited to the Oyster lug profile. Artisan production ensures finishing and thickness consistent with the watch's price bracket.

The lifespan of a leather strap depends on the material, frequency of use and exposure to perspiration and moisture. A quality alligator strap, used with care and kept away from prolonged contact with water and sweat, can last between 3 and 5 years. Vegetable-tanned calfskin and shell cordovan behave similarly, though they develop a natural patina over time that enriches their appearance. Casati Milano provides an 18-month guarantee against manufacturing defects on all atelier straps.