IWC Schaffhausen An 18ct gold automatic wristwatch with hooded lugs and date, circa 1960. Dial: silvered Calibre: cal. 8531 automatic, 21 jewels. Movement number: 1699855. Case: 18ct gold round, snap-on back. Case number: 1406575. Dimensions: 35 mm diameter. Signed: case, dial and movement. Accessories: none