Cosmograph Daytona Zenith Daytona 16520 — 400-Unit Bezel, 200–240 Interval

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..

• 400-unit bezelBezelThe frame surrounding the crystal at the front of a watch. with 200–240 interval

  Later bezel to 400 units per hour with a 40-unit step between 200 and 240.