The object is a rack holding eight vacuum tube modules. Each module has sockets for two vacuum tubes. The object also has 22 BNC connectors and five terminal strips. Two vacuum tube modules contain smaller vacuum tubes, type 5965. There are three indicator light assemblies attached to the object. The assembly contains one white light and one red light. The vacuum tube modules have a paper tag attached labeled "E6-6-2" through "E6-6-9".
Handwritten on a white sticker underneath the bracket.
Etched into a black plastic label on the edge of the bracket.
Printed in white on the side of one of the brackets.