Rolex
Day-Date 36 118206-0042— lug 20mm

The lug width of the Day-Date 36 118206-0042 is precisely 20 millimetres. This dimension represents the distance between the case lugs' anchor points and must be measured perpendicularly—from the outermost point of one lug to the corresponding point on the opposite lug—to ensure perfect strap compatibility.

For the platinum Day-Date 36, we recommend either alligator in slate grey or black, which complements the metal's austere tonality, or shell cordovan in mid-brown, creating elegant visual contrast and depth. Vegetable-tanned calf represents the most versatile option, offering practical everyday wearability with appreciable natural ageing characteristics.

Strap replacement requires a spring bar tool to compress the spring-loaded bars anchoring the strap to the case. Position the tool in the lateral slots of the bars, apply gradual pressure, remove the old strap, seat the new strap's bars, and allow the springs to reposition. If uncertain, consult an authorised service centre.

Yes, any strap featuring a 20-millimetre lug width is mechanically compatible. Verify that the strap's spring bars possess the correct diameter (typically 1.8 millimetres) and that the bar slots align properly within the case lugs. Bespoke artisanal straps, such as those crafted by Casati Milano, guarantee both perfect compatibility and elevated construction quality.

Leather strap longevity depends on material type and wearing patterns. A quality alligator or shell cordovan, worn daily, typically lasts 3–5 years; vegetable-tanned calf endures approximately 2–4 years. Body moisture, sunlight exposure, and frequency of wear accelerate deterioration. With proper maintenance—regular cleaning and immediate drying after water contact—longevity increases substantially.