Typed on yellow inventory tag from SOUTHWESTERN AT MEMPHIS DEPARTMENT OF PHYSICS
Stamped on metal plate on top of object
overall: 16 in x 17 1/8 in x 9 1/2 in
This object is housed in a nice wooden box with a leather handle on top. There is sloped metal front panel with 18 dials with calibrations from -2.5 to plus 2.5. The dials are labeled with degree values as follows: 0, 20, 40,......, 320, 340. There is also a 9 position selector switch, an analog meter, 1 toggle switch labeled X1/X2. There is also an ON/OFF switch, a pilot light, and a recessed twist-lock plug for a power cord.