(!!!!) (~ BEST ECC803S Single ~) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1965 1% section balance (Gm=1650/1650) (1.1/1.1ma)
(!!!!) (~ Recommended Single ~) ECC803S=12AX7 Telefunken Ulm Germany <> bottom low hours/like new condition 1967 reboxed (1.0/1.2ma)
