Strap for Datejust 31 Yellow Gold Fluted / Oyster / White Roman

The Rolex Datejust 31 ref. 178278-0097 has a lug width of 16mm. This measurement should be taken internally between the lugs using a digital calliper placed directly against the case, ensuring accurate compatibility with aftermarket straps.

For an 18-carat yellow gold case in the 31mm format, alligator leather with vegetable tanning is the most refined choice, offering structured grain and a developing patina. Box-calf leather provides a sleeker, more understated aesthetic, while shell cordovan delivers exceptional density and natural lustre. Cognac, bordeaux and tobacco brown are the most harmonious colour options.

Strap replacement requires a fine-tipped spring bar tool. Remove the spring bars carefully from the lugs to avoid scratching the gold case. Place the dial face-down on a soft cloth and work under adequate lighting. If in doubt, consult a watchmaker or a specialist atelier.

Yes. Although 16mm is a less common lug width than 18mm or 20mm, dedicated aftermarket options are available. Milano Straps offers a curated selection of handcrafted 16mm straps in various leathers, available online or made to order, with buckle or deployant clasp options.

Longevity depends on the material and frequency of use. A high-quality alligator strap with vegetable-tanned leather and waxed thread or silk stitching typically lasts 3 to 5 years with daily wear. Shell cordovan tends to outlast most leathers due to its dense fibre structure. Prolonged exposure to water and perspiration should be avoided, as both accelerate leather deterioration.