(1) Tested RCA 6CX8 Tube with Box Date Code CR Medium Mu Triode Pentode Tube

6AN8A NOS/NIB GE Triode/Pentode Tube-Gt Britain-Tested-Free Shipping in US

(1) Tested Sylvania 6JC8 Tube with Box Date Code NR EDF Triode Pentode Tube

(1) Tested Zenith 6KT8 Tube and Box Red Letters Code 74-22 GE EIA Triode Pentode

(1) Tested Westinghouse 6GH8A Tube with Box Date Code 70-22 Triode Pentode

(1) Tested RCA 6CX8 Tube with Box Date Code DM Medium Mu Triode Pentode Tube

(1) Tested GE 6X8 Tube with Box Date Code 61-22 Triode Pentode Converter Tube

One Excellent GE 6JZ8 Tube NOS NIB Triode/Pentode HICKOK 6000A Results