ROLEX, REF. 11-85, A HISTORICALLY INTERESTING STEEL CHRONOMETRY CLOCK

This extremely rare clock was originally used at the Rolex factory as a final test for the chronometers produced there. This electronic clock was incredibly accurate, thus could be used to measure how much time was lost by each chronometer. Given that the accuracy of their watches has long been the pride of Rolex, this is fabulous and very seldom opportunity to acquire a piece of their vaunted watchmaking process.