6H8CBranded RFTRound TipBaseBlackBottle HeightShortBottle ShapeSkinny BottleCountryEast GermanyGlass ColorClear GlassMicaDouble Ceramic SpacerPermanentid7h8zbfqovPin ColorSilver PinsPlate ColorMatte GrayPlate LookSmoothTip ShapeRound TipYear1950More 6H8C type tube6H8C, 6H8MBranded HfMore tubes branded RFTEL84Branded RFTEL34Branded RFTECC81Branded RFTEF86Branded RFT6SN7Branded RFTKT77NationalBranded RFTECC83Branded RFTECC82Branded RFTEL34Branded RFT