For sale 2x Vacuum Transmitting Tube JAN CRC 813 / VT144 :
Type: 813 power transmitting tube
Designation: JAN (Joint Army-Navy), meaning it was military-spec.
Markings: CRC = Contractor (often RCA under government contract).
VT-144 is the military code number for the 813.
1 piece is by RCA and the other piece is by Sylvania
