(!!!!!) (Best Value Pair) 12AT7=ECC81 Telefunken Germany Diamond Bottom <> used/good 1960's (7.6/6.2ma and 6.2/7.2ma)1 low noise pair) 12AT7 Telefunken Germany Diamond Bottom <> used good 1960's in white boxes fairly good printing 1 tube) 7. 6 6. 2ma Gm=4300 4000 1 tube) 6. 2 7. 2ma Gm=4100 4600 Good used mA range 7 9ma Good used Gm range 4000 5500 BEST FOR: Earmax Silver Edition APEX 460 WAVAC 805 SE amp Kora integrated amp TUBE MICS CJ PV10A VTL Manley audio gear Manley Reference Cardioid mic Atma Spere Preamplifier MP 1 Mk. III Lector CDP0. 6T Berning Audio