Found on an engraved plastic label on the bottom of the chassis.
Found on the chassis stamped in white
overall: 13 in x 26 in x 7 1/2 in
This is a generic module rack with 10 modules installed. Each with two vacuum tubes. There are 22 coaxial connectors. Numbers on each of the cooaxial connector spaces read J1-1 through J10-4. At one end there are two terminal strips on the top, two at the bottom, and one on the side of the chassis. "PIUMP #113" is engraved on a plate at the bottom of the module. There are three sets of indicator lights labeled "DATA", "RSR CONTROL", and "REFERENCE".