1955-56 Audio Twin Triodes. 2 NOS Philco JAN CBRZ 12AU7 Vacuum Tubes. The tubes are labeled as JAN CBRZ 12AU7. Philco’s manufacture code number 260 is also printed on the tubes. Hickok TV-7D/U tests.
1955-56 Audio Twin Triodes. 2 NOS Philco JAN CBRZ 12AU7 Vacuum Tubes. The tubes are labeled as JAN CBRZ 12AU7. Philco’s manufacture code number 260 is also printed on the tubes. Hickok TV-7D/U tests.