Rolex
Datejust 31 278289rbr-0020— lug 16mm

The lug width of the Rolex Datejust 31 reference 278289rbr-0020 is 16mm. This dimension is specific to the 31mm ladies' model and is essential for selecting the correct strap. The 16mm measurement represents the precise distance between the two metal lugs on the case where the strap is inserted.

For a white gold Datejust 31, alligator leather remains the most elegant choice: its soft texture and well-defined scales enhance the purity of the precious case. Alternatively, vegetable-tanned calf leather offers extraordinary aging patina over time, creating a unique relationship with the watch. Structured NATO straps provide the modern solution for those seeking versatility without compromising sophistication.

Changing the strap requires two essential tools: a small spring bar remover and a protected work surface. Gently insert the remover into the lateral holes of the case to release the metal pin, remove the old strap and insert the new one by applying pressure until you hear the safety click. This procedure takes only a few minutes and is fully reversible: you can return to the original strap at any time without damaging the case.

Absolutely. High-quality aftermarket artisanal straps offer greater customisation compared to the original strap: choice of leather, thread colour, buckle type and deployante. A custom-made strap from a specialist craftsman (such as Casati Milano) guarantees perfect proportions, meticulous construction and extended warranty. Simply ensure the lug width is exactly 16mm.

A fine leather strap (alligator, vegetable-tanned calf) typically lasts 3-5 years with daily use, provided it is cared for properly: avoid prolonged water immersion, protect from intense direct sunlight and apply natural balm every 6-8 months. Structured NATO straps last longer (5-8 years) due to fabric durability. Longevity also depends on lifestyle: formal use extends strap life compared to intensive daily wear.