(!!!!!) (Best GE Pair) 6550A GE NOS "stapled plates" 1980-1982 (150ma and 152.5ma)
(!!!!!) (BEST GE PAIR) 6550A GE NOS "stapled plates" late 1970's same build (135.5ma and 136.5ma)
(!!!!!) (Best JAN Pair) JAN-6550A GE NOS "stapled plates" 1984-1985 (123ma and 124ma)
(!!!!!) (Best Overall Pair) 6550 Tungsol branded Raytheon smooth gray plates NOS 1960-1963 era (136ma and 137ma)
(!!!!!) (Best Overall Pair) 6550 Tungsol branded Sylvania smooth gray plates NOS same date codes 1963 era (141ma and 143ma)
(!!!!!) (Best Overall Single) 6550 Tungsol black plate NOS branded Sylvania late 1950's (135ma) (Recommended for Audio Research power supply)
(!!!!!) (Best Pair) 6550A GE NOS "stapled plates" 1980 era (141ma and 144ma)
(!!!!!) (Recommended GE Pair) 6550A GE NOS "stapled plates" 1980-1982 (128ma and 132ma)
(!!!!!) (Recommended Pair) 6550 Tungsol branded Raytheon smooth gray plates NOS 1960-1963 era (126ma and 127ma)
(!!!!!) (Recommended Pair) 6550 Tungsol USA gray plates with holes 1965-1967 (144ma and 145ma)
(!!!!!) (Recommended Pair) 6550 Tungsol USA gray plates with holes 1965-1967 (146ma and 149ma)
(!!!!!) (Recommended Pair) 6550 Tungsol USA NOS gray plate with vent holes 1971 (128ma and 130ma)
(!!!!!) (Recommended Pair) 6550A GE NOS "stapled plates" 1980 era (128ma and 132ma)
(!!!!!) (Recommended Single) 6550 Tungsol black plate NOS 1960 (136ma) (Recommended for Audio Research and Tavish power supply)
(!!!!) (Recommended Tungsol Single) 6550 Tungsol black plate like new 1957 tarnished base (130ma) (Recommended for Audio Research power supply)
(!!!) (BEST SINGLE) 6550 Tungsol NOS gray plate rebranded RCA 1972 (137ma) (Recommended for Audio Research Ref power supply)
(!!!) (Best Value Single) 6550 Tungsol gray smooth plate 1960 low hours/like new (125ma) (Recommended for Audio Research power supply)
(!!!) (BEST VALUE) 6550 Tungsol USA NOS gray smooth plate rebranded RCA 1962 (123ma) (Recommended for Audio Research Ref power supply)
(!!!) 6550 Sylvania branded International NOS 1979 (146ma)
(!!) (BEST VALUE) 6550A GE stapled plates NOS around 1980 (119ma) (nice single)
