Strap for Datejust 31 Rose Gold / Diamond / Grey - Roman / Oyster

The lug width (ansa measurement) of the Rolex Datejust 31 278285rbr-0026 is 16 millimetres. This width is specific to the 31mm Datejust and reflects the case construction proportions to maintain visual balance and elegance. Verification can be performed by inserting a digital calliper between the two spring bar pins on the case.

For the 278285rbr-0026 in Everose, an alligator strap with vegetable tanning in cognac or dark brown is strongly recommended, as it dialogues naturally with the rose gold patina of the case. An alternative of equal elegance is Tuscan calf in bordeaux or black. For versatility, shell cordovan offers structural memory and controlled ageing characteristics.

The Datejust 31 strap is changed by removing the spring bars (metal suspension pins) positioned above and below the lugs. Use a dedicated spring bar tool to lift the bar gently, remove the old strap and insert the new one. The operation requires precision to avoid scratching the case. Casati Milano provides this service at their Milan atelier by appointment.

Yes, any strap with a 16mm lug width is compatible with the 278285rbr-0026. It is important to verify that the strap lugs accommodate the case thickness appropriately. MilanoStraps.it offers a complete selection of artisanal 16mm straps, tested for compatibility with the Datejust 31.

The lifespan of a leather strap depends on construction quality, frequency of use and maintenance care. A quality artisanal strap in alligator or vegetable-tanned calf maintains structural integrity for 4–6 years of daily wear. Natural patina development (colour shift, wear characteristics) is a desirable characteristic, not a defect. Casati Milano guarantees 18 months against manufacturing defects.