This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Japan
INSTRUMENTS-Miscellaneous
3 terminals on back, plus an electrical contact strip, painted black, black face with white letters and numbers.
3-D (Diameter x Depth): 6.7 × 4.6cm (2 5/8 × 1 13/16 in.)
Non-Magnetic White Metal Alloy
Glass
Copper Alloy
Solder
Paint
A19940134000
National Air and Space Museum
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