Integrating One-Shot S4303M system building block
The board has various passive and active components, which are surrounded by an aluminum frame and a blue plastic 22 pin male connector. On the solder side there is a grid lettered A-Z.
Digital Equipment Corporation (DEC)
||Printed on the solder side near the insertion end.
||Stamped into the side of the metal frame
||Stamped into the face of the metal frame
overall: 1/2 in x 7 in x 4 1/2 in