The reference 3462, the “Centregraph”, is one of the first chronograph made by Rolex in the ’30s, produced in a very few examples only for a few years.
The movement has a so called ‘stop watch’ function, with a monopusher at 2 o’clock. The dial is of an unique Salmon color, called “Telephone Dial” for the special round indexes. A Dial layout mostly used only by Rolex and Patek Philippe.