(!!!!) (Best Brimar Single) CV4024=12AT7WA Brimar NOS square black plates 1975 (13.4/13.6ma)
(!!!!) (Best Overall Single) CV4024=12AT7WA Brimar NOS square black plates 1966 (11.2./11.4ma)
(!!!) (Best Value Single) 6201=12AT7 GE Hewlett Packard NOS 1968 (8.2/9.6ma)
(!!!) (Recommended Siemens Single) ECC81=12AT7 Siemens branded Mullard NOS circa 1970 (10.0/10.8ma)
(!!) (Recommended from 1950's) 12AT7WA Sylvania gray plates triple mica "D" getter halo tests like new 1950's (9.4/12.0ma)
(!!) (Recommended from 1958) JHS-12AT7WA Sylvania triple mica "D" getter NOS 1958 (11.6/15ma) (phase inverter, reverb)
(!!) (Recommended from 1964) 12AT7WA Sylvania NOS 1964 (7.0/8.4ma)
(!!) (Recommended Single 1961) JLRV-12AT7WA=6201 GE Canada gray plates triple mica "U" getter NOS 1961 (9/12ma)
(!!) (Recommended Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (7.6/7.0ma)
(!!) (Recommended Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (8.0/9.2ma)
(!!) (Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (6.0/7.4ma)
(!) (1950's Single) 12AT7WA Sylvania black plates triple mica "D" getter used/good 1950's (6.2/7.0ma)
(!) (~ Best Value ~) JG-12AT7WA=6201 GE gray plates triple mica "U" getter low hours/like new 1958 (8.8/10.6ma)
(!) 6201=12AT7WB GE 5 Star gray plates used/good 1964 (6.5ma/6.0ma)
(!) 6201=12AT7WB GE gray plates NOS 1969 (6.2ma/6.6ma)
(!) JG-12AT7WA=6201 GE black plates triple mica "U" getter used/strong 1955 (10ma/15ma)
(!) JG-12AT7WA=6201 GE NOS gray plates 1963-1964 (7ma/7.2ma)
12AT7WA=6201 GE NOS gray plates 1965 (7.8ma/10.6ma)
6201=12AT7 GE "5 STAR" used/good triple mica "U" getter halo, copper grid posts, gray plates, 1957 (6.2/7.8ma)
6201=12AT7WA RCA Black Plates "o" getter halo used/like new 1961 (8.6/7.8ma)
