(!!!) (Best Pair) CK-5755=420A Raytheon clear top NOS 1965 (1.8/1.9ma and 1.8/2.0ma)
(!!!) (BEST PAIR) 6463 GE NOS 1966 (16.8/21ma and 17.6/21.5ma) (Highest mA and Gm)
(!) (#2 6EW7 Single Tube) 6EW7 GE Japan BIG BOTTLE NOS 1960's (5.0/37ma)
(!) (Single) E288CC=8223 Siemens Halske Germany NOS 1974 (36/35ma)
(!!!) (Best Value Single) 12AX7=ECC83 SIEMENS HALSKE GERMANY like new 1966 (1.0/1.1ma)
(!) (Single) 12AZ7A Tungsol gray plates "O" getter halo NOS 1960 era (8.4ma/9.0ma)
(!) (Single) 12SN7GTA RCA black plates NOS 1960's (8.4/8.0ma)
(!!) (Single) 2C51 Tungsol black plates "O" getter halo tests like new 1960's faded printing (7.6/7.0ma)
(!) (Pair) 12B4A GE NOS 1960's (37ma and 38.5ma)
(!!!!) (Recommended Pair 1964) 12AU7=ECC82 Philips Miniwatt Holland NOS "o" getter halo 1964 (10.4/10.0ma and 10.2/9.8ma)
(!!!) (Best Sylvania 1955) 12AX7 Sylvania pinched black plates "square" getter halo NOS 1955 (Gm=1500/1700, 1.0/1.1ma)
(!!!) (Best Single 1962) JHS-12AX7 Sylvania NOS 1962 (Gm=2600/2500 and 1.8/1.9ma)
(!!!) (Best Pair) VT-174=3S4 Tungsol NOS 1943 (100/60 and 100/60)
(!) (- Best Value) JAN-5847A=404A Amperex USA NOS 1988 (23ma and 24ma)
(!) (1950's Single) 12AT7WA Sylvania black plates triple mica "D" getter used/good 1950's (6.2/7.0ma)
(!!!) (Recommended Pair 1940's) USN-CRC-6AC7 RCA 1942-1945 used/test like new (11.5/11.6ma)
(!) (slightly microphonic single) CV4004=12AX7 Mullard NOS 1981 (1.3/2.1ma)
(!!!) (BEST PAIR #2) ECC808=6KX8 Telefunken Diamond Bottom NOS 1969 (1.1/1.1ma and 1.1/1.4ma)
(!) (Single) 6267=EF86 Amperex East Germany by RFT NOS 1982 (2.3ma)
(!!!!) (Best Pair) 6EU7 RCA NOS 1967 (57-50/32 and 52/56/32)
