Strap for Day-Date 40 Everose - Diamond / Slate Ombré

The lug width of the Rolex Day-Date 40 228345RBR-0025 is 20 millimetres. This width is the definitive standard for this model and requires absolute precision when selecting a strap. To verify compatibility, use a digital calliper and measure the internal distance between the lug shoulders: you will find exactly 20mm.

For the 18-carat rose gold 228345RBR-0025, we recommend cognac alligator or shell cordovan. Alligator amplifies the sophistication of the case with its natural grain, whilst cordovan is ideal for daily wear thanks to its extraordinary durability and patina that develops over time. For calf leather, choose waxed leather with natural tannins and wax treatment, not synthetic oils.

Changing the strap on a Day-Date 40 requires particular attention to the 20mm lugs. Use a dedicated tool to release the lug pins (spring bars), gently pushing from one side to pop the pin from its seat. Insert the new strap ensuring the pin enters both lugs completely. If you are not experienced, entrust the task to a specialised service like Casati Milano to avoid scratching the case.

Any strap with a 20-millimetre lug width is compatible with the Day-Date 40 228345RBR-0025. We recommend choosing from alligator, shell cordovan, waxed calf, rubber and NATO; all available in the 20mm version. Always verify the measurement before purchase to ensure perfect fit without gaps or overlaps.

The lifespan of a leather strap varies according to material and usage. Shell cordovan lasts 5–7 years in daily wear, acquiring a natural patina. Alligator lasts 4–5 years if treated with natural wax. Waxed calf has a lifespan of 3–4 years in frequent use. Rubber and NATO last longer (7–10 years) but still require periodic replacement. Exposure to sunlight and moisture accelerates natural ageing.