(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany branded "SATOR" NOS 1964 (8.2ma/8.2ma) 1-2% section balance
(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany large "U" getter NOS 1957 (7.3ma/8.6ma)
(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany NOS branded VALVO 1966 (9.0ma/10.6ma)
(!!!) (Recommended Single) ECC81=12AT7 Adzam by Mullard UK NOS 1970 (13.2/15.8ma)
(!!!) (slightly microphonic single) ECC801S Telefunken <> bottom rebranded 12AT7/ECC81 Telefunken NOS 1962 (9.2ma/10.2ma)
(!!) (Best GE Single) 12AT7=6679 GE NOS 1978 (10ma/10.1ma) 1-2% section balance
(!!) (Best used single) 12AT7 Telefunken Diamond Bottom used/good early 1960's (9.0ma/9.4ma)
(!!) (Good Value Single) 12AT7 Mullard made in Hyperlec Brive France NOS 1970's (10.2/10.8ma)
(!!) (Good Value Single) 6201=12AT7 Valvo Germany rebranded Philips SQ 1970 (6.8/7.8mA)
(!!) (Good Value) 12AT7 Telefunken Diamond Bottom used/good 1960's (8.2ma/10.4ma)
(!!) (Good Value) 12AT7 Telefunken Diamond Bottom used/good 1963 (6ma/7ma)
(!!) (Good Value) 12AT7 Telefunken Diamond Bottom used/good early 1960's (7.8ma/10.8ma)
(!!) (Good Value) 12AT7 Telefunken Fisher Diamond Bottom used/very good 1964 (10ma/12ma) (Highest mA and Gm)
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany NOS 1970 (10.3/11.0ma)
(!!) (Single) 6060=12AT7 Brimar Thorn UK square black plates triple mica large "O" getter halo 1957 used/good (7.2/7.6ma) (Premium low noise 12AT7)
(!!) (Single) 6060=12AT7 Brimar Thorn UK square black plates triple mica large "O" getter halo 1960 NOS (6.4/8.4ma) (Premium low noise 12AT7)
(!!) (SINGLE) ECC81=12AT7=CV455 Mullard BVA UK copper grid posts NOS 1962 (10/10.6ma)
(!!) (SINGLE) M8162=12AT7WA Mullard UK copper grid posts NOS 1963 (9.2/13.5ma)
(!!) (slightly microphonic) B309=12AT7 GEC UK black plates "D" getter NOS 1950's (9.6/10.8ma)
(!!) (~ Best Value ~) 12AT7 Toshiba JAPAN black plates rebranded CM Curtis Mathes NOS 1960's copper grid posts (9.0/9.2ma)