Cosmograph Daytona Zenith Daytona 16520 — First-Series 200-Unit Bezel

Identifying details

• Screw-down pushers

  ChronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display. pushers that screw down onto the case for water resistanceWater resistanceA watch’s ability to resist water entering its case under specified conditions, often stated as a pressure or equivalent depth. Seals can deteriorate and the crown can be damaged, so an original rating does not establish a vintage watch’s present resistance..

• 16520 first-series 200-unit bezelBezelThe frame surrounding the crystal at the front of a watch.

  Earliest self-winding Daytona , graduated up to 200 units per hour.