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(!!) (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)
(!!!) (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)
(!!!) (single) ECC81=12AT7 Philips Miniwatt by Mullard UK like new "o" getter 1957 (8.2/7.6ma) (Mitcham plant)
(!) 12AT7 Mullard Heath "D" getter used/good 1959 (6.4/7.6ma)
(!) 12AT7 Mullard Heath "D" getter used/like new 1960 (8.0/9.6ma)
(!!!) (Recommended Single) 12AT7 GE NOS 1981 (7.0/6.8ma)
(!!!) (Single) 12AT7 GE gray plate NOS 1975 (8.4ma/6.8ma)
(!!!!) (Best Sound/Best Price) 12AT7 GE gray plates NOS 1961 (10/15ma and 14.5/10ma) (sweet sound)
(!!!) (Best Single) 12AT7=ECC81 Siemens Halske Germany branded Telefunken NOS 1961 (12.2ma/10ma)
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany used/strong 1964 (8.2ma/12.2ma)
(!!) (Best Value Single) 12AT7WA Raytheon NOS black plates - triple mica - O getter halo 1975 era like new (8/12.6ma)
(!!!) (Best Single) JAN-12AT7WA Raytheon NOS black plates - triple mica - O getter halo 1968 (13.8/13.4ma)
(!!!!) (BEST SINGLE #3) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (8.6/11.8ma)
(!!!!) (Single) 12AT7 RCA NOS 1965 (7.2/12.8ma) (good tone)
(!!!!) (Best Sound/Best Price) 12AT7 GE gray plates NOS 1961 (11.5/13ma and 13.5/11.5ma) (sweet sound)
(!!!) (Best Value Pair) 12AT7 RFT East Germany branded Haltron NOS 1970's (9.8/8.6ma and 9.3/9.2ma) 1-5% matched
(!!!) (Single) 12AT7 GE gray plate NOS 1978 (9.5ma/12.5ma)
(!!) 12AT7=ECC81 Mullard UK "D" getter used/good 1960 (6.8/7.5ma)
(Best Single) 12DT8 Sylvania black plates NOS 1970's (12.4/13.6ma)
