Strap for Datejust 31 Yellow Gold / Fluted / Grey - Roman / Oyster

The lug width of the Datejust 31 in yellow gold, reference 278278-0031, is 16 millimetres. This measurement determines compatibility with any third-party strap or bracelet. To verify it, remove the original bracelet from the spring bar holes at 12 and 6 o'clock and measure the distance between the terminal lugs.

Nile alligator with vegetable tanning represents the supreme choice: its deep grain complements 18k yellow gold without competition. Alternatively, aged Tuscan calf leather offers discreet elegance and authentic patina development over time. For sportier use, shell cordovan ensures durability and that characteristic lustre that resists wear.

The procedure requires a spring bar remover tool. Position it beneath the spring bar at 12 o'clock and press gently to release it; repeat at 6 o'clock. Lift the strap or bracelet and insert the new 16mm strap, ensuring the spring bar clicks securely into place. If uncertain, consult an authorised Rolex dealer or experienced watchmaker.

Yes, any strap with a 16mm lug width is compatible with the Datejust 31 reference 278278-0031. Always verify that the terminal lugs or passants of the strap match the case dimensions. Milano Straps' <a href="https://milanostraps.it/collections/cinturini-orologi-per-misura-ansa-16mm">16mm straps</a> are specifically engineered for this size.

Lifespan varies depending on material and usage. A quality alligator or calf leather with vegetable tanning typically lasts 5–8 years under normal wear (daily use, moderate humidity and sun exposure). Shell cordovan can exceed 10 years. Factors such as perspiration, saltwater and direct UV exposure accelerate ageing. Periodic maintenance and seasonal rotation significantly extend strap life.