The module with nine sockets, all of which are populated with vacuum tubes of varying size. 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 four IBM inspection stamps.
Date
1958
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
002473
Stamped on the chassis
Other number
3087607
Stamped on the chassis
Other number
6543-6545
Handwritten on a round sticker on the inside of the handle.
