Rolex
Datejust 31 178274-0029— lug 16mm

The Rolex Datejust 31 ref. 178274-0029 has a lug width of 16 mm. This measurement must be taken internally between the two lugs at the strap attachment point. Respecting this dimension is essential to ensure correct fitment and aesthetically proportionate wear.

For the Datejust 31 in steel and white gold, an alligator strap with vegetable tanning is the most coherent choice for the model's formal register. Alternatively, smooth calfskin or shell cordovan offer more understated yet equally refined options. For casual or summer use, a nylon NATO or vulcanised rubber strap provides comfort and water resistance.

To replace the strap on a Rolex Datejust 31, the spring bars connecting the strap to the case must be removed using a dedicated spring bar tool or a soft-tipped flat lever to avoid scratching the lugs. It is advisable to perform the operation on a soft cloth and, if in doubt, to consult a watchmaker or the Casati Milano atelier.

Yes, there are numerous high-quality aftermarket options compatible with the Datejust 31. The fundamental requirement is a lug width of 16 mm. Milanostraps.it offers a selection of handcrafted straps in premium leathers, available both as bespoke commissions and ready-to-ship pieces, specifically sized for this measurement.

The lifespan of a leather strap depends on the quality of the tanning, daily usage and maintenance. A quality vegetable-tanned alligator strap, worn in rotation and stored away from moisture and perspiration, can last between 3 and 7 years while maintaining its structure and patina. Shell cordovan, due to its dense fibre structure, tends to offer greater longevity than standard calfskin.