The object is a module with nine sockets, all of which are populated with vacuum tubes. The sockets are framed by a metal handle. Attached to the handle is a chassis containing 11 printed circuit boards, 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
001881
Stamped on the chassis
Other number
3087033
Stamped on the chassis
Other number
6054-6056
Handwritten on layered stickers on the inside of the handle.