Strap for Day-Date 40 Everose - Diamond / Sundust - Diamond

The Rolex Day-Date 40 228345rbr-0007 requires a 20 millimetre lug width. This dimension is determined by the space between the two lateral lugs of the case and is a Rolex construction standard for modern 40mm dress watch models. To verify compatibility, measure the distance between the spring bar slots: it must be exactly 20mm.

Alligator leather with vegetable tanning represents the supreme formal choice: the structured grain and natural cognac or mahogany patina create perfect visual harmony with 18-karat rose gold. Shell cordovan is the solution for those preferring extreme durability and unparalleled sheen. For daily versatility, grained calf leather permits bolder colour combinations (navy blue, ochre). All are compatible with 20mm lug width.

Strap replacement requires a spring bar tool to remove the elastic pins securing the strap to the lugs. Insert the tool into the lateral slot of the lug, apply gentle pressure to compress the internal spring, then extract the pin. Repeat for both sides. Insert the new pins into the artisanal strap, then secure them to the lugs. We recommend this operation at the Casati Milano atelier to avoid damage to the case.

Yes, any strap with a 20mm lug width is mechanically compatible. However, construction quality varies enormously. Artisanal Casati Milano straps—made from alligator, shell cordovan and calf leather—guarantee a finish, patina and durability incomparable to standard industrial straps. The leather and framework are aesthetically coordinated to enhance the rose gold.

An artisanal strap in premium leather typically lasts 4-7 years with proper maintenance (periodic cleaning, drying after humidity exposure). Shell cordovan and alligator have greater longevity (up to 10+ years) due to superior fibre density. Periodic replacement is advised for hygienic and aesthetic reasons. Casati Milano offers an 18-month warranty on manufacturing defects and can perform corrective maintenance throughout the strap's useful life.