Tudor Oysterdate Chronograph Big Block 79170The 12 Hour Bezel Panda Big Block The Tudor Big Block was an exciting piece for Tudor as it was the first automatically wound chronograph from the Wilsdorf stable a full decade ahead of the reference 16520 Rolex Daytona. This example houses a classic Panda dial, which is a silver sunburstdial with black sub registers. The dial remains in perfect condition and all the lume plots are all intact. The case is fantastic and remains full and strong at all