Educational building block module
Digital Equipment Corporation (DEC)
||PA 601F & TP 650C
||On the wiring side of the board.
overall: 4 1/4 in x 1 1/2 in x 6 3/4 in
The object has been altered by adding a potentiometer to the front panel which has obscured some lettering on that panel.
Hewlett-Packard Company (HP)