The module has sockets for 9 vacuum tubes (all present) of varying size. All the tubes are framed by a metal handle. In the chassis there are 11 phenolic circuit boards. The boards are wired to male connectors at the bottom of the chassis. Also printed on the chassis are four inspection stamps reading "K IBM" followed by a three digit number.
Date
ca. Nov. 1956
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
002474
Found stamped on the chassis.
Other number
3087607
Found stamped on the chassis.
Other number
6543
Handwritten on a circular paper label on the inside of the handle
Other number
6544
Handwritten on a circular paper label on the inside of the handle
Other number
6545
Handwritten on a circular paper label on the inside of the handle
Other number
B02 B J
Found typed on a paper label at the front of the handle.
Other number
D 3087607 002474
Found typed on a paper label at the front of the handle.
