Reference A386 El Primero | A stainless steel automatic chronograph wristwatch with date, Circa 1970 Dial: silvered Caliber: cal. 3019 automatic, 31 jewels Case: stainless steel, screw down case back Case number: 2'30E'901 Closure: stainless steel Zenith buckle Size: 38 mm diameter Signed: case, dial and movement Box: yes Papers: no Accessories: Zenith presentation box, operating instructions booklet, and hang tag