for an entire calendar year. Located on the back of
the watch, a special cam whose shape recalls the
analemma controls the equation of time display
once the current month has been set using the
corrector located on the side at 8 o'clock. From a
technical perspective, the movement cage had to
be shifted and the gears rebuilt to preserve the
perfect symmetry on the dial between the power
reserve and equation of time displays.
EQUATION OF TIME FUNCTION
The hand indicates the difference between the
mean solar time and the real solar time which varies
throughout the year.
For example, if the equation of time hand shows
+14 minutes, this means that the mean time
displayed by the minute hand is 14 minutes ahead
of the real solar time.
6 5
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...