Strap for Datejust 31 Rolesor Yellow Domed / Oyster / Black MOP

The Rolex Datejust 31 ref. 178243-0068 features a lug width of 16mm, measured internally between the two case lugs. This is a non-standard size in mainstream watch strap production, so it is advisable to use straps specifically made for this dimension, with curved ends shaped to match the Rolex case profile.

For the Datejust 31 with a mother-of-pearl dial and two-tone steel and yellow gold case, a vegetable-tanned alligator strap in champagne or cognac tones is the most cohesive choice: the scale texture complements the iridescent dial surface. Alternatively, polished box-calf leather or natural shell cordovan provide an impeccably formal aesthetic. A yellow gold deployant clasp completes the two-tone pairing elegantly.

To replace the strap on a Datejust 31, the spring bars securing the strap to the case lugs must be removed using a bifurcated springbar tool, applying careful leverage to avoid scratching the lugs. Given the delicacy of the two-tone steel and gold case, it is recommended to have this carried out by a watchmaker or at a specialist atelier, or to work on a soft surface with microfibre protection cloths.

Yes, high-quality aftermarket straps compatible with the 16mm lug width of the Datejust 31 are available. It is essential that the strap features correctly curved ends to match the Rolex case geometry and precise lug spacing. Milano Straps offers handcrafted straps made to measure for this reference, in a variety of materials and finishes, with bespoke customisation available at the Casati Milano atelier.

The lifespan of a leather strap depends on the material, tanning method and usage conditions. A quality vegetable-tanned alligator strap, kept away from water and excessive perspiration, typically lasts between three and five years while retaining good structural integrity. Calf leather and cordovan offer comparable longevity. Milano Straps provides an 18-month warranty against manufacturing defects. Regular rotation between straps and the use of specialist leather conditioner will maximise longevity.