(!!!!) (#1 6550A GE Pair) 6550A GE NOS "stapled plates" around 1980 same date codes (132ma and 134ma) (excellent pair)
(!!!!) (#2 6550A GE Pair) 6550A GE NOS "stapled plates" around 1980 same date codes (121ma and 123ma)
(!!!) (#1 6550 TUNGSOL used/pair) 6550 Tungsol gray plate with vent holes used/strong 1967-1969 (125ma & 126ma)
(!!) (#3 6550 TUNGSOL used/pair) 6550 Tungsol gray plate with vent holes used/strong 1965-1976 (134ma & 138ma)
(!) (#3 6550 Tungsol used/pair) 6550 Tungsol USA gray plate with vent holes used/good 1964-1967 in white boxes (108ma and 110ma)
(!) 6550 Sylvania branded RCA used/tests like new 1984 (134ma)
(!) 6550 Sylvania used/tests like new 1970's no printing (132ma)
(!) 6550 Tungsol branded RCA used/good 1976 (120ma)
(!) 6550 Tungsol gray plate - vent holes - used/good around 1970 (136ma)
6550 Sylvania branded RCA used/good 1977 (122ma)
6550 Sylvania branded RCA used/good 1979 (112ma)
6550 Sylvania used/very good 1970's rattle inside base (126ma)
6550 Tungsol branded Leslie gray plate with vent holes used/good 1968 (129ma)
6550 Tungsol gray plate with vent holes used/75% 1974 (90ma)
6550A GE used/55% 1970's "welded plates" (82ma)
