(!!!) (Best used single) 12AT7 Telefunken Diamond Bottom used/good 1960's (10.0ma/10.8ma)
(!!!) (Best Value Pair) 12AT7WB=6201 GE NOS 1965-1969 (6.0/7.4ma and 6.0/7.2ma)
(!!!) (Best Value Pair) JAN-12AT7WC GE gray plates NOS 1970 (7.0/7.6ma and 7.0/8.2ma)
(!!!) (Best Value Single) 6201=12AT7 GE Hewlett Packard NOS 1968 (8.2/9.6ma)
(!!!) (Best Value) 12AT7 Amperex Mullard UK NOS 1971 (7.5/11.2ma)
(!!!) (Best Value) 12AT7 Mullard UK NOS 1969 (9.4/7.6ma)
(!!!) (Good Value Pair) ECC81=12AT7 IEC Mullard used/good 1967 (6.8/7.0ma and 7.0/7.2ma) (Jolida, Fender)
(!!!) (Good Value Single) 12AT7 Tungsol NOS 1960's (6.4/8.4ma)
(!!!) (Good Value Single) ECC81=12AT7 Mullard old logo made in Hyperlec Brive France used/good (8.4/9.8ma)
(!!!) (Good Value) E81CC=12AT7 Haltron England NOS around 1960 (8.4/10.2ma)
(!!!) (Recommended Pair) 12AT7 GE gray plates NOS 1977 (8.0/8.8ma and 8.2/8.8ma)
(!!!) (Recommended Pair) 12AT7 RCA gray plates NOS 1960's (7.2/8.0ma and 8.0/8.2ma)
(!!!) (Recommended Pair) ECC81=12AT7 Mullard UK NOS 1970-1971 branded Amperex an Adzam (9.6/13.4ma and 9.8/14.4ma)
(!!!) (Recommended Pair) JAN-12AT7WC GE gray plates NOS 1972-1975 (8.8/9.0ma and 8.4/8.6ma)
(!!!) (Recommended Siemens Single) ECC81=12AT7 Siemens branded Mullard NOS circa 1970 (10.0/10.8ma)
(!!!) (Recommended single) 12AT7 Brimar UK black plates "O" getter halo copper grid posts NOS 1957 (16.0/15.2ma)
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (7ma/11ma) (recommended for mic)
(!!!) (Recommended Single) 12AT7 Tungsol rebranded AKRAD "U" getter NOS 1956 (6.2/6.6ma)
(!!!) (Recommended Single) 12AT7=ECC81 Mullard branded Raytheon NOS 1972 (11/13.2ma)
(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany branded "SATOR" NOS 1964 (8.2ma/8.2ma) 1-2% section balance