KT66Branded MarconiRound TipBaseBlackBottle HeightTall BottleBottle ShapeCoke BottleCountryEnglandGetterBottom GetterGlass ColorClear GlassPermanentid02yh9q4jPin ColorSilver PinsPlate ColorBlackTip ShapeRound TipMore KT66 type tubesKT66Branded G.E.C.KT66Branded Genalex7581A, KT66Branded National ElectronicsKT66Branded MarconiKT66M-O Valve Co. LtdBranded MWTKT66Branded OsramKT66Branded EmitronKT66Branded G.E.C.KT66Branded OsramKT66M-O Valve Co. LtdBranded GenalexGold MonarchMore tubes branded Marconi6CA7, XF4Branded MarconiZ729, EF86Branded Marconi12AX7A, 7025AMarconiBranded MarconiECC82, B329, K61MullardBranded MarconiECC83, B339, F91MullardBranded Marconi12AX7Branded MarconiECC83, B339, I61Branded MarconiECC83, 12AX7Branded MarconiB329, 12AU7Branded MarconiECC83Branded Marconi
