Triple Flip-Flop 4206H system building block
There are several components on one side of the board, which is surrounded by an aluminum frame and two blue plastic connectors, one male and one female.
Digital Equipment Corporation (DEC)
||Printed on the solder side of the board
||Stamped into the side of the aluminum frame
1/2 x 4 1/2 x 10 3/4 (HWD)
Component: circuit board / module