Stamped at the insertion end on the component side
Printed on the solder side and stamped at the insertion end on the component side
overall: 1/2 in x 5 1/2 in x 4 5/8 in
Standard Modular System (SMS) card of unknown function. There are discrete transistors and other components. Covering the board. There is an opaque cover over the components. The model number 5300005 is printed in solder on each of these modules.