The object is a large metal circuit carrier with a phenolic board mounted underneath. It has 12 vacuum tube sockets, 7 are populated. Various BNC jacks and a multi conductor connector are mounted on the top. The string "842 PARITY REGISTER SERIAL #21" is engraved into a black/white plastic name plate affixed to the bottom. The string "403 IN OUT REGISTER" printed in red on the top. The string "DIGITS 0 - ?" printed in white on the top, the last number is obscured by a black residue.
Date
1951
Identifying Numbers
Other number
842
Engraved into a black/white plastic name plate affixed to the bottom
Serial number
21
Printed in white on the top and engraved into a black/white plastic name plate affixed to the bottom