12AU7ARCABranded SuperiorPinched TipCountryCanadaGlass ColorClear GlassMicaDoublePermanentid22q6q288g2Pin ColorSilverPlate ColorMatte GrayPlate LookRibbed / ScalePlate Size17mmTip ShapePinched TipMore 12AU7A type tubes12AU7AHitachiBranded Marconi Radiotron12AU7ABranded Toshiba12AU7ABranded General Electric12AU7A, ECC82MatsushitaBranded Lindal12AU7ABranded Heintz & Kaufman12AU7ABranded Arcturus12AU7ABranded Raytheon12AU7AMullardBranded Rogers12AU7A, ECC82Branded RCA12AU7A, ECC82Branded MazdaMore tubes manufactured by RCA6SN7GT, VT-231RCABranded Crc5963RCABranded Leeds & Northrup7058RCABranded RCA5R4GYRCABranded Sylvania7027ARCABranded Conn6BH6RCABranded Dumont7025RCABranded Wurlitzer6973RCABranded Kinsman5R4GYRCABranded Amperex7025, 12AX7ARCABranded MagnavoxMore tubes branded Superior6973RCABranded Superior