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Zenith El Primero*** A386 Box & Papers*** 1971
ZENITH El Primero Ref A386, Box & Papers, Circa 1971
Serial: 923DXXX
Circa: 1971
Reference: A386

DIAL: Tri-Color dial with silver base and blue, grey and silver counters. Date window between 4 & 5 o'clock. White hands with red central chronograph seconds hand. White outer tachymeter ring.

CASE: 40mm, stainless steel with screw back.

MOVEMENT: Caliber 3019 PHC, Self-winding mechanical chronograph movement with 31 jewels

BRACELET: Zenith singed Gay Freres braceled dated 3.71 and original Zenith leather strap

CONDITION REPORT: This watch comes with red Zenith box and warranty booklet.

NOTES: NOTES: It was in 1962 that the basics of the El Primero movement first took shape on the drawing board. The idea was simple: to create an iconic watch that would be launched in time for the centenary of the Manufacture in 1965. The idea was simple, but the technical specifications were not. It was to be the first automatic chronograph ever. Better still, the caliber was to be fully integrated and designed as an inseparable whole. There would be no additional module, but instead a construction built around a column wheel and a central rotor mounted on ball bearings. It would also need to beat at a high frequency in order to be the world’s most accurate chronograph. To complicate matters still further, the movement was to be miniaturized and equipped with a date mechanism. All these factors amounted to an equation so complex that it would take seven years to solve it – four years past the anniversary date. 1971 was the last year of the star logo on the caseback. In the transitional year 1972-73, Zenith introduced a new, square logo, as well as a new system of model codes. Serial numbers on the back were no longer used.

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