The object is a module with sockets for nine vacuum tubes (all are present). 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 three digit number.
Date
ca. Nov 1956
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
000374
Stamped on the chassis.
Other number
3087033
Stamped on the chassis.
Other number
6054
Handwritten on a paper label on the inside of the handle
Other number
6055
Handwritten on a paper label on the inside of the handle
Other number
6056
Handwritten on a paper label on the inside of the handle
