The original El Primero, one of the first automatic chronograph movements ever produced. Announced January 10, 1969. Features an unusually high beat rate of 36,000 vph (5 Hz), enabling 1/10 second timing precision. The date is displayed at 4:30 position. Production ceased around 1975 during the quartz crisis. The movement was reissued in 1985 as Cal. 400.
Movement Type
Automatic
Jewel Count
31 jewels
Power Reserve
50h
Frequency
36,000 vph (10 Hz)
Diameter
30mm
Height
6.5mm
Display Type
Analog
Rotor Type
bidirectional
Winding
tungsten carbide rotor segment
BRAND
ZenithTYPE
AutomaticSTATUS
DiscontinuedMANUFACTURE
In-houseLAUNCH YEAR
1969CALIBER FAMILY
El PrimeroCOUNTRY
SwitzerlandALSO KNOWN AS
