Strap for Datejust 31 Rolesor Yellow Domed Diamond / Jubilee / MOP Diamond

The Rolex Datejust 31 reference 178343-0017 has a lug width of 16mm. This is a non-standard size compared to the more common 20mm or 18mm. Always measure with a digital calliper between the lugs before purchasing an aftermarket strap. The strap ends must be curved to follow the profile of the Rolex case correctly.

For the Datejust 31 178343-0017 with its yellow Rolesor case and mother-of-pearl dial, the most suitable materials are alligator in burgundy or plum tones, vegetable-tanned calf leather in cognac, or vulcanised rubber with a grain texture for more active use. A deployant clasp in yellow gold or gold-tone PVD completes the pairing with material and chromatic coherence.

To replace the strap on a Datejust 31, you will need a spring bar tool with a 1.5mm tip. Remove the spring bars carefully to avoid scratching the steel and gold lugs. For curved-end straps, it is advisable to rely on a watchmaker or the Casati Milano atelier for the first replacement, as incorrect fitting may damage the lug finishing.

Yes. Several artisan manufacturers produce aftermarket straps with a 16mm lug width and curved ends compatible with the Datejust 31. Milano Straps offers bespoke straps in various materials and finishes with 16mm attachment, including full personalisation of length, colour and clasp type through the Casati Milano atelier.

The longevity of a leather strap depends on the material, maintenance and frequency of use. A high-quality alligator strap, used in rotation and properly maintained, typically lasts 3 to 5 years before showing significant signs of wear. Vegetable-tanned calf leather develops a patina over time but is more sensitive to moisture. Milano Straps provides an 18-month warranty on manufacturing defects.