The object is a module with seven sockets, four are populated with vacuum tubes of varying size, and three are plugged. The sockets are framed by a metal handle. Attached to the handle is a chassis containing 14 printed circuit boards and two wire wound power resistors, which are wired to the 3 male connectors at the bottom. There are two IBM inspection stamps.
Date
1958
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000156
Stamped on the chassis
Other number
3087059
Stamped on the chassis
Other number
6104-6105
Handwritten on a round sticker on the inside of the handle.
Other number
B02 N P
Typed on a paper label on the front of the handle.
Other number
D 3087059 000156
Typed on a paper label on the front of the handle.