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(!!!!) (Single) JAN-6189W=12AU7 Philips by Sylvania NOS 1987 (8.2/8.8ma)
(!!!!) (Best Overall Pair 1964) 12AU7=ECC82 Mullard BVA UK ribbed plates shield logo NOS 1964-1965 (13.3/12ma and 12.6/11.5ma) (Rogue, Hovland, Audio Note) (Highest mA and Gm)
(!!!!!) (BEST PAIR 1963) 12AU7=ECC82 Mullard UK ribbed plates NOS 1963 same date codes (9.5/8.6ma and 9.0/8.6ma) (close Gm) 1-3% matched
(!!!!!) (PAIR 1961-1962) 12AU7=ECC82 Mullard BVA UK ribbed plates NOS 1961-1962 (10/8.6ma and 10/8.8ma) (close Gm) 1-3% matched
(!!!!) (Best Single #2) 12AU7=ECC82 Mullard UK shield logo NOS 1965 (11.2/12.6ma) (smooth rich sound) (Copy)
(!!!!) (Single 1961) 12AU7=ECC82 Mullard BVA UK shield logo NOS 1961 (7.5/9ma) (Gf1 series) (smooth rich sound)
(!!!!) (Recommended Single 1957) 12AU7A Zenith Sylvania D getter NOS 1957 (13.0/13.2ma)
(!!) 12AU7A Sylvania NOS 1970 (8.8/9.2ma)
12AU7A Sylvania Dumont NOS 1960's (10/8.8ma)
(READ REVIEW) JG-5814A=12AU7 GE triple mica NOS "o" getter 1958-1959 (9.8/9.6ma) 1-2% section balance
(!) 12AU7A Sylvania NOS 1960 (10/10.1ma) 1-2% section balance
(!!!) (Single) 12AU7=ECC82 Telefunken Germany <> bottom ribbed plates like new 1959 (9.6ma/11.8ma)
