Rolex
Day-Date 36 118388-0022— lug 20mm

The Rolex Day-Date 36 ref. 118388-0022 features an exact lug width of 20 millimetres. This measurement is fixed and represents the internal distance between the pins that attach the strap to the case lugs. Any compatible strap must measure precisely 20mm to ensure correct mechanical fit, eliminate play, and maintain structural conformity.

Alligator leather remains the historically correct choice: its regular scale texture perfectly complements the refinement of yellow gold. For those seeking maximum durability, Japanese shell cordovan offers natural water resistance and develops an amber patina after 1-2 years of daily wear. Calf leather with vegetable tanning represents the optimal compromise between breathability, longevity (beyond 10 years), and daily versatility.

Strap replacement requires a dedicated spring bar removal tool. Gently insert the tool's tip into the small lateral slot on the case lug, compressing the internal pin downward. Once the pin is extracted, the old strap releases. Position the new 20mm strap and reinsert the pin until it clicks into place. This is a delicate operation; specialised workshop service is recommended to avoid damage to the lug attachments.

Yes. Any strap with a 20mm lug width is mechanically compatible. We recommend premium materials such as alligator, shell cordovan, or vegetable-tanned calf leather to respect the watch's construction quality. Avoid synthetic textiles or artificial fibres: accelerated degradation undermines the yellow gold's value. Milano Straps offers curated 20mm strap selection with warranty and bespoke Casati Milano service.

A premium leather strap (alligator, cordovan, vegetable-tanned calf) typically lasts 3-5 years with daily wear and average perspiration. Vegetable-tanned calf leather exceeds 10 years if properly maintained (six-monthly cleaning with damp cloth, avoiding prolonged sun exposure). Alligator and cordovan degrade more slowly but require protection from saltwater and extreme humidity. Actual longevity depends on climate, cleaning frequency, and initial construction quality.