Strap for Datejust 31 Stainless Steel Diamond / Oyster / Grey - Diamond

The lug width of the Rolex Datejust 31 278384rbr-0009 is 16 millimetres. This dimension defines the space between the case lugs where the strap is attached and represents an established standard for mid-sized Rolex cases. It is essential to verify this specification before purchasing an aftermarket strap to ensure correct ergonomic and aesthetic compatibility.

For the two-tone white gold and steel Datejust 31, black alligator remains the classical choice: the regular grain texture amplifies the perception of discreet luxury. Vegetable-tanned calf leather offers a patina that develops over time, whilst sport rubber adapts the timepiece to more casual contexts. The choice depends on your daily usage patterns and dominant wardrobe colour.

Changing the strap on a Rolex Datejust 31 requires specific tools: a spring-bar lever (forked tool) and the corresponding Rolex original spring-bar. Position the watch on a soft cloth, insert the lever beneath the lug pin to open the spring mechanism, then extract the old strap. Insert the new strap, ensuring the spring-bar is correctly positioned before closing. If uncertain, entrust the task to an authorised service centre.

Yes, provided the strap is manufactured for 16 millimetre lug width. Verify the technical specifications from the manufacturer and prefer specialist strap makers who guarantee precise tolerances to Rolex standard. Lower-quality straps may present loose fitting or accelerated wear. Casati Milano straps, customisable to order, guarantee precise compatibility and durability over time.

A quality leather strap (alligator or calf) on a Rolex with daily wear typically lasts 3-5 years before requiring professional maintenance. Longevity varies according to tanning quality, frequency of use, exposure to water and sunlight, and regular care. Periodic conditioning with creams specific to fine leather significantly extends useful life. With Casati Milano, you receive an 18-month warranty against manufacturing defects and professional guidance for preventative maintenance.