Transferred from the United States Air Force.
Country of Origin: Germany
3-D Test: 6.4 x 6.4 x 6.4cm, 0.1kg (2 1/2 x 2 1/2 x 2 1/2 in., 5/16lb.)
Other (Face): 2in. (5.1cm)
Case - aluminum
Lens - glass
Bracket - wood
Black case and face with white luminous needle and markings; marked -50, 0, 40 and °C at bottom center; recessed male receptacle on rear with 3 intact pins and 1 broken pin; wood bracket for indicator with 2 screw and metal socket.