Strap for Day-Date 36 White Gold Diamonds / President Diamond / Rhodium Diamond Emerald

The Rolex Day-Date 36 reference 118389-0079 features a 20 mm lug width, specific to the 36 mm case. This measurement is determined by the internal space between the upper and lower spring bar pins. Precise measurement is essential to avoid incorrect strap installation, which could damage the original case lugs.

For a white gold Day-Date 36 reference 118389-0079, alligator leather represents the most refined choice, ideally in black or deep brown with vegetable tanning to develop a natural patina over time. High-quality calf leather with transparent finish is an elegant and more accessible alternative. Vulcanised rubber remains the practical solution for daily wear. Light-coloured materials or multi-pattern designs are unsuitable, conflicting with the formal restraint of the case.

Strap replacement requires a dedicated spring bar tool to extract the pins from the case lugs. Position the tool in the lateral notch of the pin, pushing downward to release the old strap's lug, then insert the pins into the new 20 mm strap, aligning the lug perfectly with the case. If unfamiliar with the procedure, consult an expert to avoid scratching the case.

Yes, a high-quality aftermarket strap custom-made by experienced craftspeople is fully compatible with the Day-Date 36. The strap must be constructed for the 20 mm lug width and respect the visual proportions of the 36 mm case. Aftermarket alligator, calf, or shell cordovan straps, crafted with precision, can offer aesthetic and durability superior to standard OEM options.

A premium leather strap with vegetable tanning typically lasts 4-6 years with moderate daily wear, extendable to 8-10 years with seasonal rotation and proper maintenance. Longevity depends on exposure to moisture, salt, perspiration, and UV radiation. Shell cordovan is the most durable material, easily exceeding 10 years. Appropriate care and timely repairs—such as replacing keeper loops and lugs—significantly extend the strap's useful life.