55mm dia; World War II; 0 to 160 deg c; dual pointers;
Dial with radium paint sealed inside a cylindrical black metal housing with a glass face. There are ferrous alloy coils attached to the back of the metal housing that have copper alloy tubes attached to the ends.
Transferred from the U.S. Air Force
Restrictions & Rights:
Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum