Zenith El Primero Sub Sea

Wristwatch with stopwatch function, Ref. 01–0190–415, circa 1975

Case: stainless steel, number 6734, screw-down case back, screw-down crown, rotating bezel, diameter approx. 44 mm
Movement: automatic, anchor escapement, calibre 3019 PHC, high-frequency movement (36,000 vibrations per hour), fine adjustment, stopwatch function via column wheel, 31 jewels
Dial: Black, hour markers, 3 subdials for small seconds, 30-minute and 12-hour counters, tachymeter scale, date
Accessories: stainless steel folding clasp, stainless steel strap

This watch is equipped with the famous "El Primero" chronograph movement, calibre 3019 PHC. Introduced in 1969, it was the first series-produced chronograph movement with automatic winding. From a private collection. Case back partially scratched, tachymeter scale partially worn, movement with repair marks.