EL PRIMERO 21
MOVEMENT
In front of you is the El Primero 21 movement.
It is the only mechanical 1/100th of a second
chronograph movement. The El Primero 21
movement is a masterpiece of modern engineering.
Constructed using state-of-the-art methods
and finished using the newest technologies and
materials, this movement fulfils two objectives: a
finish of the highest possible quality, and optimum
performance and accuracy on the wrist.
First released in 1969, the world’s most accurate
series-made chronograph entered a new era
of mechanical timekeeping with the
El Primero 21 movement. An impressive frequency
of 360,000 vibrations per hour is testament to
the groundbreaking ingenuity of Zenith, and
enables precise measurement of time periods to
a hundredth of a second. The jump from tenths to
hundredths of a second is a quantum leap in terms
of watchmaking performance and engineering.
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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...