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(!!!!) (BEST SINGLE #2) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (7.7/7.8ma) 1-2% section balance
(!!!!) (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)
(!!) (Single) 12AT7 Brimar Zaerix square black plates triple mica large "O" getter halo like new 1957 (9.2/7.0ma)
(!!!) (Single) 12AT7 GE gray plate NOS 1961 (11.4/14.4ma)
(!!!!) (Best Pair #2) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (12.8/11.2ma and 13.8/11.5ma) (closely matched)
(!!!!) (Best Pair #3) 6201=12AT7=E81CC Philips SQ by Mullard UK gold pins NOS 1974 (10.2/8.8ma and 10.6/9.2ma) (closely matched)
(!!!!!) (Best Single) E81CC=6201=12AT7 Philips Mullard UK SQ NOS gold pins 1974 (11.5/10.8ma) 1-5% section balance
(!!!!) (Best Sound/Best Price) 12AT7 GE gray plates NOS 1961 (11.5/13ma and 13.5/11.5ma) (sweet sound)
(!!!) (Recommended Mullard Pair) ECC81=12AT7 Mullard UK branded Philips NOS 1970-1973 (9.6/8.4ma and 9.0/9.4ma) (Jolida, Fender)
(!!!) (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)
