The record contains a ten module rack. Each module has two vacuum tubes. There are ten BNC connectors on one side, and two power terminal blocks on the right side.
Date
1951
Manufacturer
Massachusetts Institute of Technology (MIT)
Identifying Numbers
Other number
C4-1
On an engraved plate on the indside of the rack.
Other number
C4-9-8
Handwritten on on eight paper tags attached to the module.