Case size: 36 mm
Material: steel
Movement: automatic, caliber 3019 PHC
Year: circa 1972
Crystal: mineral crystal
Bracelet: leather strap
Reference number: 01-0210-415
Accompanied by: box
Scratches. Ding on the lower right lug. chip in crystal. The movement is running at the time of cataloguing, Bukowskis does not guarantee the future working of the movement.
Zenith's journey to develop the El Primero chronograph movement started in 1962, targeting 1965 as its centennial date. Although delayed by four years, the El Primero became the first automatic chronograph movement to fully integrate the chronograph complication in its construction, using a column wheel and rotor on ball bearings.