The patent number is located on the bottom of the plastic piece where the connector pins are held in place.
Located on the edge on the one circuit board.
overall: 6 3/8 in x 2 in x 1 in
The record contains 1 module. It has blue metal sides and a clear handle with a green band and a yellow band. There are 18 connector pins at the bottom of the object. There is one circuit board comprised of various components and wires. The manufacturer of the bottom plastic piece "Continental" is located on the bottom where the connector pins are. There are two trim pots mounted together on the sides of a plastic block. It is attached to the circuit board. There are components with printed number labels attached to them: 131, 1490, 1484, 133.