(!!!!) (Best Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1965 1% section balance (Gm=1650/1650) (1.1/1.1ma)
(!!!!) (Best Value like new) ECC803S=12AX7 Telefunken Ulm Germany <> bottom low hours/like new condition 1967 reboxed (Gm=1600/1700) (1.0/1.2ma)
(!!!!) (Recommended Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom gold pins NOS 1967 and 1969 (1.2/1.4ma and 1.2/1.5ma)
