The object is a module with nine sockets all populated with vacuum tubes of varying size. All the tubes are framed by a metal handle. In the chassis there are 14 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 number.
Date
1958 ca.
Manufacturer
International Business Machines (IBM)
Identifying Numbers
000399
The number is stamped on the chassis.
3087615
The number is stamped on the chassis.
6537
The number is written on a circular sticker on the inside of the handle.
B02 E H
The number is typed on a paper label on the front of the handle.
D 3087615 000399
The number is typed on a paper label on the front of the handle.
