The object is a module with sockets for 9 vacuum tubes (one is plugged and eight are present) of varying size. All the tubes are framed by a metal handle. In the chassis there are 10 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 three digit number.
Date
ca. Nov 1956
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000339
Stamped on the chassis.
Other number
3087055
Stamped on the chassis.
Other number
6097
Handwritten on a round paper label, which is placed over a pre-existing label with 5097-5099, inside the handle
Other number
6098
Handwritten on a round paper label inside the handle
Other number
6099
Handwritten on a round paper label inside the handle