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6CM3 GE NOS 1960's (1 pair)
6CS7 Raytheon by Toshiba Japan gray plates NOS 1970 era (21.5/10.2ma)
6CW4 GE like new 1980 (120/60)
6CW4 GE NOS 1976 (116/60)
6CW4 RCA NOS 1970 era (1 in stock)
6CW4 Tungsol NOS (1 in stock)
6CY5 NOS (40 in stock)
6CZ5 GE Canada black plate NOS 1969 (49ma) (Same build as RCA)
6CZ5 GE Europe gray plate NOS 1975 (60ma)
6CZ5 RCA black plate short bottle used/good 1960 era (48ma)
6DJ8 GE NOS 1964 orange printing (12.6/16.4ma)
6DJ8 GE NOS 1976 (25/27.8ma)
6DL5=EL95 GE East Germany NOS 1960's (18.5ma)
6DN7 RCA Mexco coin-base same internals as Sylvania NOS 1970's (40ma and 8.5ma)
6DN7 Sylvania NOS 1970 era (39ma and 7.5ma)
6DQ6B JAPAN NOS 1960's (64.5ma)
6DR7 GE branded Philco black plates NOS 1969 (2.0ma/38ma)
6DR7 GE NOS 1965 (1.1ma/36ma)
6DR7 Raytheon black plates NOS around 1960 (1.2ma/40ma)
6DR7 Sylvania branded GE black plates NOS 1977 (4.6ma/25ma)