(!!!!) (Best Value Pair #1) 12AX7=ECC83 Telefunken Germany <> bottom branded GAP/R Computor tube <> bottom smooth plates used/good 1964 era (0.9/0.8ma and 1.0/0.8ma)

1 Low Noise Matched Pair) 12AX7=ECC83 Telefunken Germany <> bottom branded GAP/R Computor tube <> bottom smooth plates used/good 1964 era in white boxes - good printing

1 tube) 0.9/0.8ma Gm=1600/1400

1 tube) 1.0/0.8ma Gm=1500/1500 

Good used mA = 0.7-0.9mA+

Good used Gm = 1300-1500+

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