One Excellent GE 6AF11 Tube NOS NIB Strong Triode/Triode/Pentode B&K 606 Results

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

(1) Tested GE 5X8 Tube with Box Date Code FV General Electric Triode Pentode

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

(1) Tested Motorola 6X8 Tube with Box Code 2-26 Triode Pentode Converter Tube

(1) Tested Motorola 6X8 Tube with Box Code 62-26 Triode Pentode Converter Tube

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

(1) Tested GE 6KA8 Tube with Box Great Britain Date Code HI Triode Pentode