(!!) (Best Brimar Single) CV4024=12AT7WA=12AT7 Brimar UK NOS square black plates 1967 (10.2/11.4ma)
(!!!!) (Best Brimar Single) CV4024=12AT7WA Brimar NOS square black plates 1975 (13.4/13.6ma)
(!!) (Recommended Single) CV4024=12AT7WA=12AT7 Brimar UK NOS square black plates 1965-1967 (10.4/9.0ma)
(!!) (recommended single 1957) CV455=12AT7 Mullard "D" getter like new 1957 (12.4/8.6ma)
(!!) (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)
(!!!) (Good Value Single) 12AT7 Tungsol NOS 1960's (6.4/8.4ma)
(!!!) (Best Value) 12AT7 Mullard UK NOS 1969 (9.4/7.6ma)
(!!!) (Best Single) 12AT7 Amperex Mullard UK NOS 1973 (11.0/11.2ma)
(!!) (Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (6.0/7.4ma)
(!!) (Recommended Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (7.6/7.0ma)
(!!) (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 Telefunken Germany <> bottom NOS 1963 (6.8ma/7.6ma) (recommended for mic)
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (9ma/6.5ma) (recommended for mic)
(!!!) (Recommended Pair) 12AT7 RCA gray plates NOS 1974 (10.5/7.5ma and 10.8/8.2ma)
(!!!!) (Best Single #2) 12AT7=ECC81 Mullard branded Raytheon NOS 1972 (9.2/9.2ma)
(!!!) (Recommended Single) 12AT7=ECC81 Mullard shiled logo used/tests like new 1963 (15.8/14.8ma)
(!!!!) (Best Single) 12AT7=ECC81 Mullard UK NOS 1972 (10.4/10.2ma)
(!!!) (single) ECC81=12AT7 Philips Miniwatt by Mullard UK like new "o" getter 1957 (8.2/7.6ma) (Mitcham plant)
(!!!!) (Best Siemens Pair #2) E81CC=6201=12AT7WA Siemens Munich Germany NOS 1977 (14.2/15.5ma and 13.8/14.2ma) (High Ma and Gm)
(!!!) (Best Value Pair) 12AT7=ECC81 RFT East Germany NOS 1970's (10.0/9.6ma and 10.4/9.6ma) 1-2% matched
