9 Set Reset Flip-Flop 4224 B System Building Blocks
Digital Equipment Corporation (DEC)
||Etched in metal frame on top.
||Etched in metal frame on upper right.
overall: 7 in x 4 1/2 in x 1/2 in
Printed circuit board in an aluminum frame with many components that include resistors, transistors and capacitors. "4224" etched on frame. Two inspection stamps on component side.