CHRONOMETER
CERTIFICATION
A chronometer is a device that measures time to the
highest accuracy, and can be adjusted to different
positions and under a range of temperatures.
The El Primero 9004 movement has been certified
as a chronometer by TIMELAB in Geneva. It
has been tested and successfully meets the
requirements set by the ISO3159 standard.
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Summary of Contents for EL PRIMERO series
Page 1: ...OPER ATING INSTRUC TIONS...
Page 4: ...ZENITH THE FUTURE OF SWISS WATCHMAKING SINCE 1865...
Page 10: ...EL PRIMERO...
Page 23: ...ELITE...
Page 31: ...EL PRIMERO 21...
Page 43: ...ZENITH OSCILL ATOR CALIBRE 9100...
Page 49: ...HAUTE HORLOGERIE...
Page 67: ...COMPLICATIONS...
Page 68: ...EL PRIMERO...
Page 81: ...ELITE...