6SN7GTBBranded CEIRound TipBaseBlackBottle HeightHalfBottle ShapeSkinny BottleCountryJapanGlass ColorClear GlassMicaDouble MicaNotes> Seems a rebranded NOS Russian 6N8.Permanentid1po9fmrw9vPin ColorSilver PinsPlate ColorMatte GrayTip ShapeRound TipMore 6SN7GTB type tubes6SN7GTBBranded Relco6SN7GTBBranded Hit-RayItt6SN7GTBBranded Sylvania6SN7GTBBranded RCA6SN7GTBBranded Sylvania6SN7GTBBranded Amperex6SN7GTBBranded Ge6SN7GTBBranded PhilipsRogers6SN7GTBBranded RCA6SN7GTBBranded WestinghouseMore tubes branded CEI12AX7ABranded CEI12AX7A, ECC83MatsushitaBranded CEI6CA7, EL34MatsushitaBranded CEIECC83, 12AX7BrimarBranded CEIEL34, 6CA7RFTBranded CEI12AX7RFTBranded CEIECC82Branded CEI12BZ7RaytheonBranded CEI