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

(1) Tested Strong GE Compactron 6AG9 Tube General Electric 6AG9 Triode Pentode

(1) Tested GE 6CU5 & Box Date Code CZ Gray Plate General Electric Power Pentode

(1) Tested GE 5AN8 Tube with Box Date Code 59-04 General Electric Triode Pentode

(1) Tested GE 1A5GT Tube Date Code 8-39 General Electric 1A5 GT Pentode Tube (b)

(1) Tested GE 6JV8 Tube with Box Date Code FI General Electric Triode Pentode

(1) Tested Westinghouse 6KA8 Tube with Box Date Code 67-43 Triode Pentode Tube

(1) Tested RCA 6KA8 Tube with Box Date Code GJ Triode Pentode Tube