Rolex
Day-Date 36 118208-0214— lug 20mm

The lug width of the Rolex Day-Date 36 118208-0214 is 20 mm (20.0 ± 0.2 mm according to manufacturing tolerance). This width is specific to this model and determines mechanical compatibility with straps. To measure correctly, position a ruler parallel to the vertical lug holes on the case, measuring hole-to-hole. A strap of different width will not fit properly and will compromise both aesthetics and watch security.

Natural Nile or Louisiana alligator represents the historical and coherent choice: the regular texture of the scales harmonises elegantly with the polished finish of yellow gold and allows a patina that matures over time. Shell cordovan is the premium alternative for those seeking greater tactile sensitivity and a natural propensity for visible ageing. Vegetable-tanned calf offers a contemporary and versatile profile. Avoid synthetic materials for this category of watch: you would compromise both the symbolic positioning and perceived quality.

Strap replacement requires a specialised tool (spring bar tool) to compress the anchor pins (spring bars) that hold the strap to the watch lugs. Insert the flat blade of the tool into the lower hole of the lug, compress the pin until it engages, and remove the strap. Repeat on the other side. To install the new 20 mm strap, align the pins with the holes, compress the pin and press until the safety click is heard. If uncertain, entrust the task to an authorised Rolex service centre to avoid scratching the gold case.

Yes, any 20 mm strap with standard spring bar is compatible with the Day-Date 36 118208-0214. However, we strongly recommend straps of superior craftsmanship (alligator, shell cordovan, vegetable-tanned calf) to honour the quality of the yellow gold case and the Rolex 3155 movement. Polyurethane or synthetic leather straps betray the positioning of this chronometer. Choose a maker specialised in natural leather of horological quality.

The lifespan of a natural leather strap ranges from 2 to 5 years depending on the material, frequency of use, climate and maintenance. Natural alligator typically lasts 3–4 years under moderate use conditions (not constant daily wear); shell cordovan can exceed 5 years thanks to its superior density; vegetable-tanned calf averages 2–3 years. In humid or tropical climates, lifespan is reduced. Visible patina and wear do not indicate mechanical failure: the strap is replaceable without compromising the watch. We recommend rotating at least two straps to distribute wear and extend the life of each.