The object is a module with nine sockets, seven are populated with vacuum tubes of varying size, and 2 have plugs. The sockets are framed by a metal handle. Attached to the handle is a chassis containing 10 printed circuit boards and 1 power resistor, all of which are wired to 3 male connectors at the bottom of the chassis. There are two IBM inspection stamps on the chassis.
Date
1958-01
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000111
The number is stamped on the chassis.
Other number
15790
The number is stamped on the side of the chassis.
Other number
3087596
The number is printed on a paper label attached to the handle.
Other number
3087596
The number is stamped on the chassis.
Other number
87596
The number is handwritten in pen on the side of the chassis.
Other number
EC 15854
The number, and engineering change number, is stamped on the side of the chassis.
