Rolex
Datejust 31 178248-0029— lug 16mm

The Rolex Datejust 31 ref. 178248-0029 has a lug width of 16mm. This measurement is specific to the mid-size 31mm variant and differs from the Datejust 36mm (20mm) and Lady-Datejust 28mm (13mm). For an accurate fit, measure between the lugs at the point of attachment to the case using a digital calliper.

For the 18k yellow gold case of the Datejust 31, a vegetable-tanned alligator belly or hornback strap is the most coherent choice: the natural grain enhances the leather's texture and develops an authentic patina over time. Chromatically, tobacco, cognac and bordeaux pair more elegantly than black, which tends to cool the warmth of yellow gold. A yellow gold deployant clasp completes the pairing without chromatic interruption.

To remove the original strap from the Rolex Datejust 31, a dual-tip springbar tool is required. Insert the fine tip into the lug hole, compress the spring bar and slide the strap free. Care must be taken to avoid scratching the gold case. It is advisable to have the operation performed by a watchmaker or to use a tool fitted with a protective plastic tip.

Yes. The Datejust 31 ref. 178248-0029 uses standard 16mm lugs with conventional spring bars, making it compatible with any quality aftermarket 16mm strap. Milanostraps.it offers a selection of handcrafted leather, NATO and rubber straps specifically made for this lug width, with a tapered closing width of 14mm.

The lifespan of a leather strap depends on the quality of the hide, the tanning process and daily use. A vegetable-tanned alligator strap, properly maintained and rotated with other straps, can last between 3 and 7 years while retaining its aesthetic and structural integrity. Prolonged exposure to water, perspiration and direct sunlight accelerates deterioration. Casati Milano offers an 18-month guarantee against manufacturing defects.