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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)
6DS4 GE NOS 1966 (101/60)
6DS4 GE NOS 1979 (120/60)
6DX8=ECL84 GE Hitachi JAPAN 1972 (5.1mA and 13mA) (Shindo)
6DX8=ECL84 GE Hitachi JAPAN 1978 (3.0mA and 14mA) (Shindo)
6DX8=ECL84 Motorola Toshiba JAPAN used/good 1960's (3.3mA and 12.5mA) (Shindo)
6E5 RCA NOS 1970's (bright eye)
6EA7 GE black base rebranded Zenith 1960 used/good (3.6ma/35ma)
6EC4A=EY500 GE JAPAN NOS 1960's (1 pair)
