This module has seven socket positions, six of which are populated. The center position is sealed off. Positions 1 and 7 are medium sized tubes, 2, 3, 5, and six are small. There are 14 PC boards with passive components below the tube sockets, two of which only have two wire-wound power resistors on them. The PC boards are connected to three male parallelogram shaped connectors at the rear. There are two inspection stamps on the top center of the frame.