The Yacht-Master II’s countdown can be programmed for a duration of between 1 and 10 minutes.

This abundance of Rolex technology, the result of over 35,000 hours of development, includes a patented function.

Some of them are made by UV-LiGA, a micromanufacturing technology entirely mastered in-house by Rolex

The programming is memorized by the mechanism so that at a reset it returns to the previous setting...

By operating its own exclusive foundry, Rolex has the unrivalled ability to cast quality 18 ct gold alloys.

Superlative Chronometer (COSC + Rolex certification after casing)