(!) 12AT7 Mullard Heath "D" getter used/like new 1960 (8.0/9.6ma)
(!) 12AT7 RCA black plates NOS D getter halo 1950's, slightly microphonic (13/16.4ma) (high Ma and Gm)
(!) 12AT7=E81CC RTC Radio Technique France NOS 1971 (7.8/8.0ma)
(!) 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)
(Best 12AT7 Value) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1984 (3 in stock)
(Best 12AT7 Value) JAN-12AT7WC Sylvania black plates NOS 1970's - 1982 (13 in stock)
(GOOD VALUE) ECC801S=12AT7 Telefunken triple mica used/65% 1967 (5.6ma/6.0ma)
(GOOD VALUE) ECC801S=12AT7 Telefunken triple mica used/65% 1967 (6.2ma/6.9ma)
(microphonic single) 12AT7 Philips Miniwatt made in Hamburg, Germany by VALVO NOS "D" getter halo 1959 (8.8/10.2ma)
(slightly microphonic tube) 12AT7 Brimar UK black plates "D" getter halo copper grid posts used/good 1955 era (7.2/8.4ma)
(slightly microphonic tube) 12AT7WA=CV455 Mullard NOS "curved D getter halo" copper grid posts 1959 perfect printing (8/9ma)
(slightly microphonic tube) ECC81=12AT7 Mullard NOS "curved D getter halo" copper grid posts 1955 (9.2/10.6ma)
(slightly microphonic) 6201=12AT7 RCA black plates NOS 1976 (11/12.4ma)
12AT7 East Germany branded "M" Mühlhausen NOS 1970's (7.2/7.6ma)
12AT7 East Germany branded "M" Mühlhausen used/tests like new stain on glass 1970's (9.4/9.6ma) (high Ma and Gm)
12AT7 Holland branded CBS Hytron NOS large "D" getter halo 1954 (8.4/10.0ma)
12AT7 RCA Black Plates "D" getter used/good mid-1950's
