VT-2316SN7GTWestern ElectricBranded RaytheonRound TipBaseBlackCountryUSAGlass ColorClear GlassMicaDoublePermanentiddco6kz6ilPin ColorSilver PinsPlate ColorBlackSpecial UseJAN - USA Joint Army NavyTip ShapeRound TipYear1944More VT-231 type tubes6SN7GT, VT-231RCABranded Crc6SN7GT, VT-231Branded Ge6SN7GT, VT-231Branded Tung-SolVT-231, 6SN7GTBranded Ken-RadMore 6SN7GT type tubes6SN7GTBranded Cossor6SN7GT, VT-231RCABranded Crc6SN7GT, VT-231Branded Ge6SN7GTBranded CbsHytron6SN7GT, R92Branded Mullard6SN7GT, R93MazdaBranded PhilipsMiniwatt6SN7GTBranded Brimar6SN7GTBranded Sylvania6SN7GT, VT-231Branded Tung-Sol6SN7GTBranded TungsramMore tubes manufactured by Western Electric350BWestern ElectricBranded National UnionMore tubes branded Raytheon6CA7, EL34MatsushitaBranded Raytheon12AU7ABranded Raytheon12DF7Branded Raytheon12AX7ABranded Raytheon12AX7Branded Raytheon12AX7Branded Raytheon7027ABranded Raytheon12AX7, ECC83ToshibaBranded Raytheon6BH6, CK6661Branded Raytheon5692RCABranded Raytheon