Strap for Datejust 31 Stainless Steel / Yellow Gold / Domed - Diamond / White - Roman / Oyster

The lug width of the Rolex Datejust 31 278343rbr-0001 is 16 millimetres. This dimension is specific to the ladies' version of the Datejust 31 and represents the point of contact between the case and the strap. A 16mm width ensures harmonious proportions with the 31mm case diameter and guarantees optimal wrist comfort without visual heaviness.

For the Datejust 31 278343rbr-0001, straps in fine-grained alligator, shell cordovan, or vegetable-tanned calfskin are particularly recommended. Black alligator is the classic choice, framing the diamond bezel whilst maintaining harmony with the yellow Rolesor case. Shell cordovan in burgundy or cognac shades offers a striking contrast, whilst vegetable-tanned calfskin provides colour versatility and supple wear for daily use.

Changing the strap on a Rolex Datejust 31 278343rbr-0001 requires a proper springbar tool and a stable work surface. Position the watch firmly on the table, locate the small hole on the lug shoulder where the springbar enters, insert the tool and gently push inward to release one end of the springbar. Repeat from the opposite side. To install the new strap, align the springbars with the lug holes and press gently until you hear the insertion click. For peace of mind, contact Casati Milano for professional installation.

Yes, any strap with a 16-millimetre lug width is compatible with the Datejust 31 278343rbr-0001. However, for perfect integration with the Rolex case and lugs, it is advisable to choose straps specifically designed for this width by specialised makers such as Casati Milano. Millimetric integration ensures the dial remains centred and transitions between case and strap follow the original Rolex aesthetic.

The lifespan of a leather strap on a Rolex Datejust 31 depends on wearing frequency, material choice and climate conditions. Quality alligator or shell cordovan, worn regularly (4–5 days per week), typically lasts 3–5 years. Vegetable-tanned calfskin tends to wear more quickly (2–3 years) due to less dense fibres. Frequent exposure to humidity or perspiration accelerates ageing. Casati Milano straps carry an 18-month warranty on manufacturing defects, but their actual longevity typically exceeds this thanks to leather quality and craftsmanship.