The object is a 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 14 printed circuit boards, all of which are wired to 3 male connectors at the bottom of the chassis. There are 3 IBM inspection stamps on the chassis.
Date
1958
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000400
The number is stamped on the chassis.
Other number
3087615
The number is stamped on the chassis.
Other number
6537
The number is hand written on a circular paper sticker that is located on the inside of the handle.
Other number
B02 E G
The number is printed on a paper label that is attached to the handle.
Other number
D 3087615 000400
The number is printed on a paper label that is attached to the handle.