5881Branded RCARound TipBaseDark BrownBottle HeightTall BottleBottle ShapeFat BottleCode On Tube7043CountryUSAGlass ColorClear GlassMicaDoublePermanentidcq1dvt051Pin ColorSilver PinsPlate ColorMatte GrayTip ShapeRound TipYear1970More 5881 type tubes5881Branded Electron Enterprises5881Branded CbsMore tubes branded RCA6386Branded RCA12AX7Branded RCA8417SylvaniaBranded RCA5692Branded RCA7591ASylvaniaBranded RCA7058RCABranded RCA12AX7, ECC83Branded RCA6BH6Branded RCA12AX7Branded RCA12AX7, ECC83MullardBranded RCA