Strap for Day-Date 36 White Gold Diamonds / President / Paved Arabic

The Rolex Day-Date 36 reference 118389-0017 features a lug width of exactly 20mm. This measurement represents the distance between the two case lugs and determines strap compatibility. It is essential to verify this measurement with a calliper before ordering a strap, as an error of even 1mm compromises installation. Always measure between the internal lugs of the case, not on the bezel.

For the Day-Date 36 118389-0017 in white gold, we recommend genuine alligator in black or cognac, which enhances the understated elegance of the case. Regular alligator (not caiman, not crocodile) offers well-defined and uniform scales, natural patina development over time, and construction sufficiently rigid to maintain wrist stability. Alternatively, vegetable-tanned calf represents a contemporary and sustainable choice, with a fine grain that dialogues elegantly with the case finishing. If you desire a bespoke strap, the Casati Milano service allows you to select leather directly in the atelier and follow every stage of craftsmanship via WhatsApp.

Strap replacement requires a springbar tool and a stable, well-lit work surface. Locate the springbar – a small metal spring connecting the strap to the case lugs. Insert the tool into the groove on the side of the springbar (facing inward) and gently push to release the spring. The strap will fall free. To install the new 20mm strap, align the ends with the lugs and push the springbar into the grooves until you hear a click. Verify that both the underside and top of the strap are properly seated in the lugs. Avoid abrupt movements: excessive lateral pressure could damage the strap.

Yes, the Day-Date 36 118389-0017 is fully compatible with aftermarket straps of 20mm lug width. The original case presents no restrictions preventing the use of third-party materials. We recommend straps crafted by specialised ateliers, particularly if you desire genuine alligator, shell cordovan, or artisanal vegetable-tanned leather. Straps produced by milanostraps.it are available in the collection dedicated to 20mm straps and offer construction that respects the proportions of the original case. A well-made strap can genuinely enhance the daily tactile experience compared to the factory original.

The lifespan of a leather strap depends on frequency of use, climate, and craftsmanship quality. A genuine alligator strap, worn daily and subjected to ordinary maintenance, typically lasts 5-7 years before requiring replacement. Calf, more delicate, may last 3-5 years under intensive use. Artisanal vegetable-tanned leather, owing to its natural porosity and reduced exposure to synthetic solvents, tends to age elegantly and can exceed 10 years if maintained with periodic dry cleaning and occasional applications of neutral balm. Exposure to direct sunlight, excessive humidity, and repeated contact with perspiration accelerate deterioration. With Casati Milano, every strap is guaranteed against manufacturing defects for 18 months.