Handwritten on a white paper tag under the plexiglass
overall: 1 1/2 in x 5 1/4 in x 9 in
The record contains a module with two vacuum tubes and supporting circuitry, which is housed within the chassis. There is a thick tubular handle at the top with a locking screw that runs all the way through the connector.There is a connector at the bottom of the module with places for 24 contacts, but four a vacant due to the presence of the locking screw. There are plexiglass covers over the components. "NR3138-BOX 5-#6" is handwritten on a white paper tag under the plexiglass.