Rolex Oyster Tru-Beat 6556 Silver Crosshair DialThe forgotten doctors watch This is a very rare and important vintage Oyster that dates to the 1950s. One of the rarest Rolex complications out there. Only created in a short period. The Tru Beat was one of the first dead seconds wristwatches ever offered. Instead of the flowing seconds hand that one normally sees on a mechanical watch, dead seconds calibres tick once per second. What sounds very simple is incredibly complicated and requires a new