Vacuum tube type 6Y6
||Stamped on the side of the object
overall: 4 1/2 in x 1 3/4 in x 1 3/4 in
The object is from the Whirlwind collection. Information on a piece of cardboard found in the box reads "Bus Driver Arithmetic Rack S/N4." The tube has 8 pins, one of which is empty.
Gift of the Digital Equipment Corporation