Strap for Datejust 31 Stainless Steel Domed Diamond / Oyster / Pink - Roman

The lug width (ansa width) of the Rolex Datejust 31 278344rbr-0025 is 16mm. This measurement represents the distance between the two lugs (case attachment points) and is critical for aftermarket strap compatibility. A 16mm strap fits perfectly without lateral play, maintaining visual alignment between case and strap.

For the Datejust 31 278344rbr-0025 with Rolesor (white gold and stainless steel) case and diamond bezel, we recommend a dark brown alligator or cognac shell cordovan strap for formal occasions. For everyday wear, vegetable-tanned calf offers natural patina development and comfort. French alligator is the classic choice, shell cordovan the contemporary option.

The strap is changed using a spring bar tool (specialized tool for removing elastic pins). Position the tool beneath the suspension pin, gently compress it to retract the elastic tip, then extract the pin from the lug. Repeat on the opposite side. Install the new strap by inserting the pins into the opposite case attachments. If uncertain, consult an authorised service centre.

Yes, any strap with a 16mm lug width is mechanically compatible with the 278344rbr-0025. Milano Straps offers a collection of bespoke 16mm straps in natural leather, crafted by Milanese artisans to match the proportions and aesthetic standards of the Datejust 31. Compatibility is guaranteed by precise measurement.

A high-quality natural leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 3-5 years with regular daily use, depending on climate and maintenance. Vegetable-tanned leather tends to show visible aging but maintains better structural integrity. A well-maintained leather strap (protected from excess moisture, dried promptly) can last 7-8 years. Milano Straps provides an 18-month warranty against manufacturing defects.