Printed in black on the face of the beige extraction handle.
Stamped into the handle on the circuit side
Printed in solder on the left edge near the top on the circuit side
overall: 1/2 in x 2 1/2 in x 5 3/8 in
On one side of the module there are transistors, capacitors, diodes and resistors. "POS LEVEL TO DEC. LEVEL RECIEVER" is printed in solder on the top right edge on the circuit side. "January 31, 1974" is stamped on the component side.