Rolex
Datejust 31 178159-0067— lug 16mm

The Rolex Datejust 31 178159-0067 features a lug width of 16mm. This measurement is consistent across the entire Datejust 31 family in the 31mm oyster case and must be matched within a ±0.5mm tolerance to ensure correct fitting without placing stress on the spring bars.

For the white gold case with diamond bezel, alligator belly straps in cool tones (grey, ivory, cappuccino) or shell cordovan in burgundy offer the most coherent pairing. Vegetable-tanned calf leather is the most versatile alternative, combining aesthetic quality with long-term durability. NATO nylon straps are not recommended due to stylistic incongruity with the refined character of the case.

To replace the strap on the Datejust 31, you will need a fork-style spring bar tool with a 1.8mm tip. Insert the tool into the inner groove of the lug, compress the spring bar and slide the strap free. Care must be taken to avoid scratching the white gold lugs: protect the case with a strip of plastic film or a microfibre cloth during the procedure.

Yes. Many artisan manufacturers produce aftermarket straps with a 16mm lug width compatible with the Datejust 31. Milano Straps offers straps with an end piece shaped to follow the curvature of the oyster lugs, ensuring a precise fit with no lateral play. Buckles or deployant clasps are available in steel, yellow gold or white gold to complement the original case.

Longevity depends on the material and frequency of use. A quality alligator strap, with moderate daily wear and regular conditioning, typically lasts 2 to 4 years before showing significant wear at the holes. Shell cordovan, owing to the dense fibrous structure of the cordovan layer, can exceed 4 to 5 years. Vegetable-tanned calf leather has an intermediate lifespan but develops a personal patina over time, which many collectors regard as an aesthetic asset.