Rolex Datejust 1601 Silver Sigma DialPanning for gold The vintage Rolex Datejust is a classic watch with classic proportions that is hugely versatile and always a winner with collectors. This reference 1601 is pure vintage cool with a slow set date and cool 70s dial. The dial has two interesting elements to note. The first is that the watch is fitted with a so called pie pan dial and the second is that the dial has sigma markings either side of the T SWISS T which signifies that the hour