6SF5 NOS/NIB RCA Triode Tube-Tested-Factory Fresh-Bogen-Free Shipping in the US

6BQ7A x2 NOS/NIB RCA Twin Triode Tube-Tested-Factory Fresh-Free Shipping in US

NOS/NIB RCA 6SN7GTB Dual Triode Vacuum Tube - Tested

One Excellent RCA 6T8A 6T8 Tube NOS NIB Strong Triode & Balance Diodes AMPLITREX

6AQ7GT x2 (pair) NOS/NIB RCA Triode/Dual Diode Tubes-Tested-Free Shipping US

One RCA 7B6 Tube NOS NIB Fully Tested on Triodes & Diodes B&K 606 Results

Vacuum Tube Type 6EW7 Dual Dissimilar Triode NOS/NIB (#62095)

One RCA 14F7 Tube NOS NIB Dual Triode Tube Test[%]: 112/106 TV-7