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(!!!!) (Best 6L6GB Single) 6L6GB RCA branded Raytheon black plate NOS 1963 (75ma)
(!!!!) (Best Pair 6L6GB) 6L6GB RCA and RCA branded Tungsol black plate double "D" getters low hours/like new 1950's (78.5ma and 80ma) (rare)
(!!!!) (Best Single) 6L6GC RCA black plate NOS 1962 (88ma)
(!!!!) (Good Value Pair) 6L6GC Sylvania tall bottle NOS and like new 1960's - 1970 (72ma and 74ma)
(!) (BEST VALUE PAIR) 6L6GC Sylvania gray plate used/tests like new 1960's same date codes (66ma and 72ma) (close Gm)
(!) (SINGLE) 6L6GB RCA Baldwin gray plate used/good 1959 (65ma)
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)
