Rolex
Explorer II 16550— lug 20mm

The Rolex Explorer II ref. 16550 has a lug width of 20 mm. This is the measurement to consider when selecting any aftermarket strap, whether in leather, rubber, or nylon. It should be measured using a digital calliper, recording the internal distance between the two upper lugs of the case.

It depends on the intended use and aesthetic. For a formal look, an alligator or shell cordovan strap with a steel buckle complements the Oyster case beautifully. For sport or wet environments, vulcanised rubber is the most practical choice. Vegetable-tanned calf leather strikes a balance between everyday comfort and artisanal character, developing a personal patina over time.

To replace the strap on the 16550, you will need a spring bar tool with a fine tip. Insert it into the lug slot to compress the spring bars and release the strap. Take care to avoid scratching the case. Alternatively, a watchmaker or the Casati Milano atelier can perform the swap safely and professionally.

Yes, any strap with a 20 mm lug width is technically compatible with the 16550. Milanostraps.it offers a curated range of handcrafted straps in various materials — leather, rubber, and NATO — made to Rolex standard dimensions, including curved ends that fit flush with the Oyster case profile.

A quality leather strap — such as vegetable-tanned calf or alligator — can last between 2 and 5 years with standard care. Longevity depends on exposure to perspiration, water, and UV light. Casati Milano offers an 18-month guarantee against manufacturing defects and recommends using rubber or NATO straps in aquatic environments to protect the leather.