Cosmograph Daytona Zenith Daytona 16520 — Mk 3 · Mk 3 Variant 1

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..

• Inverted 6

  The 6 on the hour register printed upside down, so it reads as a 9.