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(!!!) (Recommended Pair) 6BK7B Tungsol black plates NOS "O" getter 1960's (8.6/7.5ma and 8.2/9.4ma)
(!!!) (Recommended Pair) 6BQ5 RCA NOS 1965-1969 (33.5ma and 34.6ma)
(!!!) (Recommended Pair) 6BX7GT GE branded RCA NOS 1958 and 1963 (47ma/52ma and 45/50ma)
(!!!) (Recommended Pair) 6JT6A RCA branded GE NOS 1979 (78ma and 80ma)
(!!!) (Recommended Pair) 6JT6A RCA NOS 1960's - 1970 era (66.5ma and 67ma)
(!!!) (Recommended Pair) 6JT6A RCA rebranded GE and Amperex NOS 1970 era (66ma and 67ma)
(!!!) (Recommended Pair) 76 Sylvania NOS - 1 tube branded National Union 1947 era same build (5.3ma and 5.6ma)
(!!!) (Recommended Pair) 7N7 Sylvania NOS branded GE and RCA 1960-1965 (9.4/8.0ma and 8.0/8.4ma) (close Gm)
(!!!) (Recommended Pair) 8417 GE NOS 1969 and 1986 same build (91ma and 94.6ma)
(!!!) (Recommended Pair) 866A GE NOS 1971 (54/60 and 54/60)
(!!!) (Recommended Pair) 866A GE NOS 1971 graphite lifted off top plate (56/40 and 57/40)
(!!!) (Recommended Pair) JAN-1619=VT-164 RCA NOS 1943 some surface rust on metal cans (55ma and 57ma)
(!!!) (Recommended Single) 12AU7A RCA clear top NOS 1967 (14.4/10ma)
(!!!) (Recommended Single) 12BZ7 RCA gray plates branded Tungsol NOS 1960's (2.0/2.1ma) 1-2% section balance
(!!!) (Recommended Single) 5691 RCA Red Base branded Westinghouse black plates used/good 1960 (1.8/2.1ma)
(!!!) (Recommended SINGLE) 5R4GY RCA branded GE NOS 1952 (49/40 and 49/40)
(!!!) (Recommended Single) 5U4GB RCA NOS 1961 (56/40 and 55/40)
(!!!) (Recommended Single) 5U4GB RCA NOS 1970's (60/40 and 58/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1954 (58/40 and 60/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1957 (58/40 and 60/40)
