The object is a module with nine sockets three contain vacuum tubes of varying size. Six of the sockets are plugged. All the tubes are framed by a metal handle. In the chassis there are 13 phenolic circuit boards. The boards are wired to male connectors at the bottom of the chassis. Also printed on the chassis are two inspection stamps reading "K IBM" followed by a number.
Date
ca. April 1957
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000312
Stamped on the chassis.
Other number
3087061
Stamped on the chassis.
Other number
6109
Typed on a paper label with a teal plastic cover on the handle.
Other number
70 61
Handwritten in black pen on the side of the handle.
Other number
D 3087061 000312
Typed on a paper label with a teal plastic cover on the handle.