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 4 1/2 in x 7 in
An aluminum frame and blue plastic 22 pin male connector surround the board, which is covered with various active and passive components. "READ-WRITE SWITCH 1985A", is printed on the solder side at the insertion end above the grid lettered A-Z.