Explorer 2

The Explorer II was created for speleologists (commonly known as “spelunkers” or “cave explorers”), who when working under the surface over long periods of time, can lose their sense of day-and-night orientation. Therefore, Rolex created a watch which always displays the 24-hour notation of time as an extra feature. They introduced the white dial later on in the 16550 model, so they can see the watch better in difficult and dim light conditions.

£3 ,790