147413. MEN'S Wristwatch IWC Ingenieur, automatic.
Made between 1959-1966. Ref 666 AD, Cal 8531, 170 66 08. Antimagnetic. 36.5 mm excl. Crown. Original link 18mm.
Engraved on the sides of the estate "nochanged 1967", and on the buckle "Tempus fugit". Damaged dial. Not function tested.