Stamped on one of the modules at the insertion end on the component side
Stamped on both modules at the insertion end on the component side.
Printed on the solder side of both modules
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. There are two of these modules. On one there is an opaque cover over the components. The model number 5300504 is printed in solder on each of these modules.