Strap for Day-Date 36 White Gold Diamonds / President Diamond / Black MOP

The lug width of the Day-Date 36 118389-0055 measures 20mm. This dimension is specific to the 36mm case model and is engineered by Rolex to maintain balanced proportions relative to the case diameter. Accurately measuring the lug width is essential before purchasing an aftermarket strap: use a digital calliper from the outer edge of one lug to the outer edge of the other, ensuring optimal compatibility.

Alligator remains the traditional and most prestigious choice for the white gold Day-Date 36: its natural texture with pronounced shoulders and consistent grain reflects light similarly to the metal case, creating visual continuity. Alternatively, vegetable-tanned calf leather offers noble ageing with golden patina development, whilst shell cordovan provides superior density and intrinsic lustre. Natural FKM rubber is a contemporary option for sports contexts without compromising presidential elegance.

Strap replacement on the Day-Date 36 requires specific tools: a spring bar tool and a small plastic hammer. Carefully remove the original bracelet by pushing the pins out from the lugs using the spring bar tool. Insert the new strap by aligning the lug holes, then reinsert the pins with the spring bar tool until fully engaged. If you lack experience, entrust this task to a professional watchmaker to prevent damage to the delicate white gold lugs.

Artisanal aftermarket straps of superior quality offer the best balance between aesthetics and longevity. Select premium leather such as South American alligator, vegetable-tanned calf, or shell cordovan. A custom-made strap with a white gold matching deployant clasp guarantees secure fit and eliminates micro-movements that wear the lugs. Casati Milano offers personalisation service at its Milan atelier with 18-month warranty on manufacturing defects.

A quality leather strap with vegetable tanning or alligator leather can last between 3 to 7 years depending on daily usage, environmental humidity, and maintenance. The leather must be protected from excessive moisture and frequent perspiration. A well-maintained strap develops a characteristic patina over time. We recommend having the strap professionally serviced every 2–3 years and keeping a second strap available to alternate usage.