Stamped at the insertion end on the component side
Printed on the solder side and printed 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 half the board. There are two of these modules. Each has an opaque cover over the components. The model number 5300010 is printed in solder on each of these modules.