6SN7GTYCV1988Branded BrimarRound TipBaseRedBrand ExtendedBrimar B.V.A.CountryEnglandGlass ColorClear GlassMicaDouble MicaPermanentidz6a830dmPin ColorSilver PinsPlate ColorMatte GrayPlate LookRibbed / ScaleTip ShapeRound TipYear1958More 6SN7GTY type tubesCV1988, 6SN7GTYBranded Mullard6SN7GTY, CV1988BrimarMore CV1988 type tubesCV1988, 6SN7GTYBranded MullardCV1988M.O.6SN7GTY, CV1988BrimarCV1988Branded G.E.C.More tubes branded BrimarECC82Branded BrimarCV1075Branded BrimarECC83Branded Brimar6SN7GTBranded Brimar12AX7Branded Brimar6SN7Branded Brimar6SN7GTBranded Brimar6CA7, EL34, XF2MullardBranded Brimar12AU7Branded BrimarCV4003, 12AU7WABranded Brimar