8 Bit register with solenoid driver 4290F system building block
Digital Equipment Corporation (DEC)
Printed in solder at the insertion end of the board
Stamped into the face of the aluminum frame
Stamped into the side of the aluminum frame
overall: 1/4 in x 4 1/2 in x 10 1/4 in
At one end of the board there is a blue plastic 22 pin connector. On one side there are several neatly arranged components including transistors, resistors, and diodes. On the other side there is a circuit printed in solder. At the insertion end there is a solder grid lettered A-Z.