KT66Branded G.E.C.Round TipBaseBlackBottle HeightTall BottleBottle ShapeFat BottleBrand ExtendedG.E.C.CountryEnglandGlass ColorGreyPermanentid4j3x0948Pin ColorSilver PinsTip ShapeRound TipMore KT66 type tubesKT66Branded Genalex7581A, KT66Branded National ElectronicsKT66Branded MarconiKT66Branded MarconiKT66M-O Valve Co. LtdBranded MWTKT66Branded OsramKT66Branded EmitronKT66Branded G.E.C.KT66Branded OsramKT66M-O Valve Co. LtdBranded GenalexGold MonarchMore tubes branded G.E.C.TT21M-O Valve Co. LtdBranded G.E.C.B339, ECC83, I61Branded G.E.C.CV2901Branded G.E.C.ECC83Branded G.E.C.U52Branded G.E.C.ECC82, B329Branded G.E.C.CV1075Branded G.E.C.KT66Branded G.E.C.TT22Branded G.E.C.B65M-O Valve Co. LtdBranded G.E.C.
