Rude Star Finder and Identifier, US Navy, 2102-C, A-N Type 1 JU-88 but it is either non-functional

but it is either non-functional or requires the correct electrical input to function

According to the Graphic Survey of Radio And Radar Equipment Used By The Army Air Forces dated July 1945:

Once the aircraft reaches 5000 Meters

so it could use repair

the Elgin A-8 continues to run until the mainspring is out of energy (in A-8's of other manufacturers

Rude Star Finder and Identifier, US Navy, 2102-C, A-N Type 1 JU-88 but it is either non-functionalFrom the National Museum of American History: This star finder, designed for aeronautical use, was based on the Rude form as modified by Elmer Collins of the United States Hydrographic Office. It consists of a white plastic planisphere with the northern sky on one side and the southern on the other that shows all the stars in the American and the British Air Almanacs; nine clear plastic altitude azimuth templates for use at different latitudes up to