Printed on the solder side of the board at the insertion end
Stamped into the front of the aluminum frame
Stamped into the side of the aluminum frame
overall: 1/2 in x 7 in x 4 1/2 in
The board is covered in various active and passive components which are surrounded by an aluminum frame and a blue plastic 22 pin male connector. There are two round inspection stamps on the component side, one of which is very faint. On the solder side there is a grid lettered A-Z.