The record contains a module with two vacuum tube sockets that are both populated. Engraved on top of unit is "CONTROL PULSE OUTPUT". "Negative Output" is also printed on a small label at the top of the module.
Date
1951
Manufacturer
Massachusetts Institute of Technology (MIT)
Identifying Numbers
Other number
C9-4 P4
Handwritten on a tag tied to the handle.
Serial number
3
Printed on the chipping finish at the top of the module.
