The object is a large metal panel with tube sockets and BNC connectors mounted on top and a phenolic board mounted underneath. It has 9 vacuum tube sockets, five of which are populated. 18 BNC jacks and a multiconductor connector are mounted on the top of the panel around the edges. The string "601 CHECK REGISTER" is printed in white ink in the center of the top of the panel, and below that "404 COMPARISON REGISTER" is printed in red ink. Most BNC connectors are labeled with engraved plastic labels mounted near each connector. The tubes are labeled with white printing on the panel near each tube socket. The phenolic board mounted to the back of the panel contains numerous studs between which components and interconnecting wiring is mounted. One pair of indicator lights with clear lenses is mounted by a bracket attached to the bottom of the metal panel.
Date
1951
Identifying Numbers
Other number
404 COR DIGIT 15
Engraved in white ink on a black plastic label attached to the lower right corner of the back of the metal panel.
Other number
F3-6
Written in black ink on a white label attached to the lower right corner of the back of the metal panel.
Serial number
32
Stamped in yellow ink in the center of the top of the metal panel.
