Rolex
Day-Date 36 118238-0105— lug 20mm

The lug width is precisely 20 millimetres. This measurement is determined by the internal distance between the two metal pins that support the strap. To verify compatibility, use a caliper and measure the distance between the pins: it must be exactly 20mm. Do not rely on approximate information, as the fitting tolerance is minimal.

Dark brown or cognac alligator is the most suitable choice, as the natural grain of American crocodile creates a visual dialogue with the warmth of yellow gold. Shell cordovan represents an excellent alternative for those seeking a dense leather capable of developing patina over time. Vegetally-tanned calf leather offers aesthetic simplicity and environmental sustainability.

Remove the watch from your wrist and position it face-down on a soft surface. Observe the lugs: you will notice two metal pins. Using a dedicated tool (spring bar tool), apply gentle upward pressure beneath the pin until it clicks open. Repeat on both sides. To install the new strap, align the pins with the designated slots and press gently until they click into position. Avoid sharp impacts that could damage the pins.

Yes, provided it has been designed for a 20-millimetre lug width. Compatibility is guaranteed only if the width is correct. Atelier Casati Milano manufactures bespoke leather straps for this specific lug width, offering personalised consultation on material selection and deployante options. It is advisable to avoid low-quality generic straps, which would compromise both the aesthetics and durability of the watch.

Durability depends on leather quality and conditions of use. A high-quality artisanal alligator or shell cordovan strap, subjected to regular maintenance, can last 5 to 7 years or longer. Constant exposure to moisture, perspiration and direct sunlight accelerates ageing. Seasonal rotation of multiple straps would significantly extend the life of each one. Casati Milano provides an 18-month warranty on manufacturing defects and offers restoration and repair services through direct assessment.