Rolex
Day-Date 36 118388-0043— lug 20mm

The lug width of the Rolex Day-Date 36 reference 118388-0043 is 20 mm. This measurement is taken using a digital calliper positioned inside the lugs, parallel to the case edge. Any aftermarket strap of 20 mm with curved ends will be compatible with this reference.

For the 18-carat yellow gold case of the Day-Date 36, the most suitable materials are polished alligator leather in bordeaux or dark tobacco, natural shell cordovan, and vegetable-tanned calf leather in cognac or honey tones. A yellow gold deployant clasp maintains the metallic coherence of the dial and protects the leather from daily wear.

The strap on the Rolex Day-Date 36 is secured via 20 mm spring bars fitted into the Oyster case lugs. A fine-tipped spring bar tool is sufficient to compress the bars and release the strap. Care should be taken to avoid scratching the gold case. If in doubt, it is advisable to entrust the operation to a watchmaker or to the Casati Milano atelier.

Yes. The quality aftermarket offers 20 mm straps with curved ends specifically designed for the lug geometry of the Day-Date 36. Milanostraps.it provides a selection of handcrafted straps in alligator, shell cordovan, calf leather and rubber, available bespoke or ready to ship, all compatible with this reference.

The lifespan of a leather strap depends on leather quality, frequency of use and exposure to perspiration and environmental factors. A high-quality alligator or shell cordovan strap, worn regularly but not daily, retains structural and aesthetic integrity for 3 to 5 years. Vegetable-tanned leather develops its own patina over time, increasing perceived value. Casati Milano's guarantee covers manufacturing defects for 18 months.