(!!!!) (Recommended Pair) 6K6GT RCA black plate NOS 1960-1967 same build (43.2ma and 46.4ma)
(!!!!) (Recommended Pair) 6K6GT Sylvania black plate NOS 1960's - 1970 same build (46.6ma and 48ma)
(!!!) (BEST OVERALL PAIR) 6K6GT Philco by Sylvania NOS 1950 (46.6ma and 47.4ma)
(!!!) (Best Pair) 6K6GT CBS black plate NOS 1960 era (48.5ma and 50ma)
(!!!) (BEST PAIR) 6K6GT Sylvania coated glass NOS 1940's (1) branded Philco (44ma and 44.6ma)
(!!!) (Best Value Pair) 6K6GT GE coin-base gray plate NOS 1981 (48ma and 52.3ma)
(!!!) (Recommended Pair) 6K6GT RCA black plate NOS 1966-1967 (43.2ma and 46.4ma)
(!!) (2nd Best Pair) 6K6GT RCA NOS coated glass 1949 (38ma and 40ma)
(!!) 6K6GT Channel Master Japan 1960's (50ma)
(!!) 6K6GT RCA branded CBS NOS 1960 some glass chips resting at bottom of tube (46ma)
(!!) 6K6GT Sylvania NOS 1970 era (42.5ma)
6K6G Cunningham used/very good 1945 era (41.6ma)
6K6GT Cunningham used/good 1946 (33.5ma)
6K6GT GE coatd glass used/good 1949 (44ma)
6K6GT Ken Rad used/good 1951 hairline crack in base (34ma)
6K6GT RCA used/good 1954 small hairline crack in base (35ma)
6K6GT Silvertone by Silvertone used/good 1956 hairline crack in base (38ma)
6K6GT Sylvania black plate NOS 1960's (38.5ma)
6K6GT Sylvania chrome top black plate lightning logo NOS 1954 (54.6ma)