(!!!!!) (BEST VALUE PAIR) 6L6GC RCA Black Plate used/good 1970-1975 (66.5ma and 67.5ma) (Gm like new)
(!!!!!) (Recommended Pair) 6L6GC RCA Black Plate used/good 1962-1964 (59.5ma and 60.8ma)
(!!!!) (Recommended Single) 6L6GC RCA black plates branded Westinghouse like new double "D" getters 1960 era (72ma)
6L6GB GE Black Plate used/good 1957 (59ma)
6L6GB Sylvania Black Plate used/good 1955 faded top getter (57ma)
6L6GB Sylvania Black Plate used/good 1955 faded top getter (65ma) (high Ma and Gm)
6L6GC Sylvania gray plate used/tests like new 1960's (66ma)
