ZENITH. A STAINLESS STEEL AUTOMATIC CHRONOGRAPH WRISTWATCH. Model: El Primero. Reference: 01-0210-41. Date: Circa 1970. Movement: Signed Zenith cal.3019 PHC, automatic.  Dial: Signed, silvered, silver numerals, polished steel sword hands, subsidiary chronograph dials at 3, 6 and 9 o’clock, date aperture between 4 and 5 o’clock. Case: Signed, stainless steel. Strap: Black leather, signed clasp. Size: 37mm.