Rolex
Day-Date 36 118235f-0052— lug 20mm

The lug width of the Rolex Day-Date 36 118235f-0052 is precisely 20 millimetres. This is a structural specification of the 18k rose gold case. To verify this measurement, use a digital calliper or millimetre ruler, positioning it perpendicularly between the inside of the two lugs at their widest point, without applying pressure. A measurement error can result in the purchase of incompatible straps.

For the Day-Date 36 118235f-0052 in 18k rose gold, alligator is the classical solution: the natural, symmetrical grain captures light in a sophisticated manner. A chocolate brown or burgundy alligator creates warm contrast with the rose gold. Alternatively, shell cordovan offers an unmistakable patina that evolves over time, whilst calf leather provides a finer grain for those preferring a discreet strap. For more versatile daily use, an FKM rubber or nylon NATO maintains elegance without sacrificing durability.

To change the strap, you will need a spring bar tool or a fine-tipped screwdriver. Place the watch on a stable surface protected by a soft cloth. Locate the small holes (vents) on the inside of the lugs: insert the tool gently into the hole, applying slight outward pressure to release the spring bar from its seat. Repeat for the other lug. Align the new strap's spring bars (20mm) into the holes, then press until you hear or feel a click. If unsure, consult an official Rolex service centre or a professional watchmaker.

Yes, provided the strap has a lug width of exactly 20 millimetres. High-quality artisanal straps (in alligator, cordovan or calf) are fully compatible with your Day-Date 36, provided the spring bars are constructed to this specification. Milanostraps.it supplies a certified selection of 20mm straps tested for this reference. Using aftermarket straps does not compromise the official Rolex warranty if the strap is removed before presenting the watch to an official service centre.

A high-quality leather strap — such as alligator, cordovan or calf — has an average lifespan of 4–6 years of daily wear, depending on frequency of wear, climate, sun exposure, perspiration, and daily care. An alligator strap with vegetable tanning ages elegantly, developing a darker and deeper patina. To extend durability, rotate the main strap with a second one (for example, rubber for summer), avoid prolonged exposure to direct sunlight and extreme humidity, and clean gently with a dry cloth. Casati Milano provides an 18-month warranty against manufacturing defects and offers a restoration service to extend the life of your strap.