Longines Lindbergh Hour Angle

This is a very rare, hour angle, indirect center seconds stainless steel Longines Lindbergh Aviators watch from the 1940s. The large case has a revolving bezel with green and black enameled 15 degree graduation, hinged back case and oversized crown. The dial is white enamel with painted Roman numerals for the 12 hour, the 180 degrees in the upright blue Arabic numberals, central revolving matte silver dial with painted black Arabic numerals for the 60 minutes and painted red Arabic numerals for the 15 degrees,outer minute track and the Breguet style hands are in blued steel. The manual wind movement is a caliber 18 69N. Triple signed.