Printed in white in the upper left corner of the board.
Soldered in the bottom left corner.
Soldered in the lower left corner on the back.
Soldered along the bottom edge.
Stamped in red on a circular white sticker in teh bottom right corner on the front.
SBC-2 a 10-82
Soldered on the right side of the board.
overall: 4 in x 6 in x 5/8 in
The circuit board is a "Corvus Systems IBM Interface". Three quarters of the board are covered in components including transistors, resistors, integrated circuits and one grey connector on the right side. On the back, there is a repeating pattern of "L" printed in red. There are two test stamps, circular with "10" printed in the middle.