Printed on the solder side of the board near the insertion end
Stamped into the face of the aluminum frame
Stamped into the side of the aluminum frame
overall: 1/2 in x 4 1/2 in x 7 in
The board have various active and passive components on one side. Surrounding the board is an aluminum frame and a blue plastic 22 pin male connector. In one corner of the frame there is a bolt holding three wrapped brass wires. There are two round inspection stamps on the component side.