A STAINLESS STEEL SINGLE BUTTON CHRONOGRAPH WRISTWATCH, CIRCA 1964
Dial: black Calibre: cal. 2220 mechanical, 17 jewels Case: stainless steel, screw down case back Case number: 0552/924-3306 and 80091 Closure: light brown unsigned leather strap and stainless steel buckle Size: 40 mm diameter Signed: case, dial and movement