(!!!!!) (Best Overall Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961-1962 perfect condition (1.1/1.3ma and 1.2/1.5ma) (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!) (Best Overall Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1962 1-2% section balance (Gm=1800/1800) (1.6/1.7ma)
(!!!!) (Recommended Pair from 1961) ECC803S=12AX7 Telefunken Germany <> bottom gold pins NOS 1961 (1.2/1.3ma and 1.2/1.3ma)
(!!!!) (Recommended Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom gold pins tests like new 1966 (1.2/1.4ma and Gm=1700/1800)
