The module has nine sockets, all of which are populated with vacuum tubes size of vary. 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. "Oct." is stamped on the handle near a date that is no longer visible.
Date
ca. 1958
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
002472
Stamped on the chassis
Other number
3087607
Stamped on the chassis
Other number
6543-6545
Handwritten on a round paper sticker on the inside of the handle.
Other number
B02 B S
Typed on a paper lable on the front of the handle.
Other number
D 3087607 002472
Typed on a paper lable on the front of the handle.