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

The lug width of the Rolex Day-Date 36 118389-0074 is 20.00mm. This measurement represents the distance between the two lugs (case horns) in white gold. It is essential to measure accurately before ordering a strap: position the ruler perpendicular to the lugs at the point where the current strap is attached. Do not confuse this with the case diameter, which is 36mm; these are independent parameters.

For the Rolex Day-Date 36 118389-0074 in white gold, we recommend primarily American alligator (Alligator Mississipiensis) for its regular texture and specular finish that echoes Rolex's aesthetic code, or shell cordovan for chromatic contrast and natural ageing patina. Vegetable-tanned calf is a more versatile option but less characterised. NATO canvas transforms the model into an informal aesthetic whilst maintaining perceptual solidity.

To replace the strap on the Rolex Day-Date 36 118389-0074, remove the spring bars (pressure pins) on both sides of the case using a dedicated removal tool. Apply gentle pressure to free the pins from their housings, extract the old strap, and insert the new strap ensuring that the pins lock securely into position. This is a delicate operation: we recommend consulting specialist jewellers or Casati Milano for professional execution.

Yes, any strap with a 20.00mm lug width is technically compatible with the Rolex Day-Date 36 118389-0074. However, it is essential to verify the geometric configuration of the strap lug profile, which must correspond to the shape of the case lugs. Original Rolex straps have Rolex-specific construction specifications; high-quality aftermarket straps (vegetable-tanned leather, alligator, shell cordovan) maintain technical compatibility whilst respecting the exact 20mm dimensions.

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) has an average lifespan of 3–5 years with daily use, depending on sun exposure, humidity and maintenance. Leather undergoes natural ageing, developing patina; minor superficial lesions do not compromise functionality. If stored in environments without excessive humidity and with moderate light exposure, the strap remains aesthetically acceptable beyond 5 years. Casati Milano provides an 18-month warranty against manufacturing defects.