Strap for Day-Date 36 Yellow Gold Diamonds / Oyster / White

The lug width (strap width) of the Rolex Day-Date 36 118388-0187 is 20 millimetres. This dimension is a precise construction standard, measured between the internal axes of the case attachment pins. A 20mm strap ensures correct fit without lateral play and maintains the visual proportions of the model.

For the yellow gold Day-Date 36 118388-0187, the most noble materials are dark brown alligator (creating chromatic contrast), burgundy shell cordovan (for evolved patina), smooth cognac-coloured calf leather (for sober elegance), and vegetable-tanned tabacco calf (for natural evolution over time). The choice depends on the intended use and personal colour palette.

The strap is replaced by removing the two lateral attachment pins with a dedicated tool (spring bar tool). The pins pass through the case lugs and support the strap ends. Align the new strap with the lugs and reinsert the pins, ensuring the retention groove is correctly positioned on both sides. The operation requires precision to avoid scratching the case.

Yes, provided the strap is made with 20-millimetre lugs. The lugs must fit the case shoulders without forcing and with minimal play. High-quality straps, such as alligator or shell cordovan, maintain the aesthetic standards of the watch. Always verify exact dimensions with the manufacturer.

A quality leather strap (alligator, shell cordovan, calf) typically lasts 3 to 7 years with daily use, depending on exposure to moisture, sweat, and UV rays. Vegetable tanning tends to last longer than chrome tanning. Regular maintenance (gentle cleaning, protection from prolonged rain) significantly extends longevity. Casati Milano provides an 18-month warranty on manufacturing defects.