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

The lug width of the Rolex Datejust 31 278384rbr-0027 is exactly 16 millimetres. This non-standard dimension is characteristic of the 31mm ladies' version and is smaller than the classical 18 or 20mm widths. Always verify this measurement before ordering a compatible strap, as straps with different lug attachments will not fit correctly onto the case.

Alligator remains the most noble choice for the Datejust 31, owing to its uniform grain and natural patina that complement the white gold case. Shell cordovan offers a compact texture and intrinsic lustre that balances elegance with practicality. For a more understated approach, Italian vegetable-tanned calf develops an authenticating patina over time. Avoid rubber or NATO straps, which compromise the celebratory aesthetic of this model.

Strap replacement involves removing the spring bars that connect the lugs to the case using a specialised tool. This operation requires precision and expertise. It is advisable to entrust this task to a skilled watchmaker or to the Casati Milano service, where professionals will oversee every stage by appointment. Improper execution risks damaging the case lugs.

Yes, provided the lug width is exactly 16 millimetres. High-quality aftermarket straps in alligator, shell cordovan, or calf are completely compatible and represent a valid alternative to replacement services at official Rolex centres. Ensure the supplier measures with precision and offers a warranty on construction quality.

The lifespan of a leather strap depends on usage and material. A high-quality alligator strap with vegetable tanning typically lasts 4–7 years with daily wear. Aged calf leather has similar durability. Shell cordovan, being more resilient, can exceed 10 years. Factors such as humidity, direct sunlight exposure, and perspiration accelerate ageing. Casati Milano straps include an 18-month warranty against manufacturing defects, excluding natural wear.