Strap for Datejust 31 White Gold Diamond / President / Black MOP

The Rolex Datejust 31 ref. 178159-0015 has a lug width of 16mm. This measurement should be taken with a digital calliper placed inside the lugs, parallel to the case back, to ensure accurate fitment of a replacement strap.

For an 18-carat white gold case such as the one on the Datejust 31 178159-0015, a vegetable-tanned alligator strap with a white gold deployant clasp is the most materially and aesthetically coherent choice. Box calf leather or shell cordovan offer more understated yet equally refined alternatives.

To replace the strap on the Datejust 31 178159-0015, you will need a spring bar tool with a fine tip (0.7–0.8mm), suitable for the white gold Oyster lugs. Insert the tip into the notch on the side of the lug, compress the spring bar and slide the strap free. Work on a soft surface to protect the case from scratches.

Yes. Any strap with a 16mm lug width and standard 1.8mm spring bars is technically compatible with the Datejust 31 178159-0015. Casati Milano handcrafted straps in 16mm are made to the specific geometry of the Oyster case, with shaped ends for an optimal fit.

The lifespan of a leather strap depends on material quality, frequency of wear and daily care. A high-quality vegetable-tanned alligator strap, with regular use and proper maintenance (avoiding prolonged contact with water and perspiration, and periodically applying leather conditioner), can last between three and six years while retaining its structural integrity and elegant appearance.