(!!!!!) (2nd Best Pair 1962) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (1.1/1.1ma and 1.1/1.3ma) 1-2% matched (Aesthetix, EAR, Lamm, VTL, Jadis, Nagra)
(!!!!!) (2nd Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 (1.2/1.3ma and 1.2/1.4ma) 1-2% matched (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (2nd Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.2/1.3ma and 1.2/1.3ma) (best in phono stages and high end preamps)
(!!!!!) (3rd Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1% matched (1.1/1.1ma and 1.1/1.1ma) (best in phono stages and high end preamps)
(!!!!!) (3rd Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.1/1.1ma and 1.1/1.2ma) (best in phono stages and high end preamps)
(!!!!!) (Best Audio Pair) PCC88=7DJ8 Philips Holland NOS 1970 (12.2/12.5ma and 12.6/13.5ma) (Similar sound to 6DJ8 Holland)
(!!!!!) (BEST GE PAIR 1969) JAN-5751 GE double mica gray plates NOS 1969 (1.9/2.2ma and 2.1/2.1ma) 1-3% matched pair
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Miniwatt Holland like new "O" getter halo 1961 (1.4/1.6ma and 1.4/1.5ma) (Highest mA and Gm) 1-2% matched
(!!!!!) (Best Pair) 5691 RCA red base black plates NOS 1956-1957 (2.2/2.3ma and 2.1/2.4ma)
(!!!!!) (Best Pair) 5U4GB CBS NOS 1950's double "D" getters (59-59/40 and 58-60/40)
(!!!!!) (Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 (1.4/1.45ma and 1.5/1.6ma) 1-2% matched (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (BEST PHONO PAIR) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (1.6/2.0ma and 1.6/1.7ma) 1-3% matched (Aesthetix, EAR, Lamm, VTL, Jadis, Nagra)
(!!!!!) (Best Siemens Pair 1972) E83CC=12AX7 Siemens Halske Germany NOS triple mica 1972 printed in 1976 (1.0/1.3ma and 1.1/1.3ma) (best in phono stages and high end preamps)
(!!!!!) (Best Single 1958) 12AX7=ECC83 Mullard UK "long plates" NOS 1958 (1.3/1.4ma)
(!!!!!) (Best Single 1961) EF86 Amperex Bugle Boy France NOS 1961 (3.1ma)
(!!!!!) (Best Single 1965) 12AX7 Mullard Bell & Howell UK NOS 1965 (1.3/1.2ma and Gm=1700/1600)
(!!!!!) (Best Single 1965) EF86 Amperex Bugle Boy Holland Belgium plant NOS 1965 (4.5ma)
(!!!!!) (Best Single 1966) EF86 Amperex Bugle Boy Holland Belgium plant NOS 1966 (3.9ma)
(!!!!!) (Best Single) EL34 Mullard UK branded CMI XF2 single halo "O" NOS 1969 (96.7ma)
(!!!!!) (Best Single) EL34 Mullard UK branded Siemens XF2 double halo "O-O" NOS 1963 (108ma)