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 11 phenolic circuit boards. The boards are wired to male connectors at the bottom of the chassis. Also printed on the chassis are two inspection stamps reading "K IBM" followed by a number.
Date
1958 ca.
Manufacturer
International Business Machines (IBM)
Identifying Numbers
000388
The number is stamped on the chassis.
3087033
The number is stamped on the chassis.
6054
The number is written on a circular sticker on the inside of the handle. It is on top of another circular paper sticker.
6055
The number is written on a circular sticker on the inside of the handle. It is on top of another circular paper sticker.
6056
The number is written on a circular sticker on the inside of the handle. It is on top of another circular paper sticker.
B02 D F
The number is typed on a paper label on the front of the handle.
D 3087033 000388
The number is typed on a paper label on the front of the handle.
