Case: two body, polished, screwed down case back, lapidated lugs.Dial: two tone, black and ivory with applied faceted baton indexes, inner minutes/seconds divisions. Steel dart hands.Movement: rhodium plated, straight line lever escapement, flat balance spring.Dial, case and movement signed.Diam: 35 mm Thickness: 9 mmDial, case and movement in quite good condition, the case is slightly scratched.Note: The airline SAS (Scandinavian Airline System) opened new routes over the North Pole in the Ninteen-Fifties. All crews on these flights had to take part in a special training at the SAS's Arctic Flight School. The swiss watch manufacturerer Universal Genève provided the crews with automatic precision wrist-watches that are resistent against the strong magnetic field of the polar region. They became the offical chronometers of SAS.