(!!!!) (Good Value Pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1982 (6.8/6.8ma and 7.0/7.2ma)
(!) 6201=12AT7WB GE 5 Star gray plates used/good 1964 (6.5ma/6.0ma)
(!!!!) (SINGLE) ECC81=12AT7 Telefunken Germany <> bottom NOS 1965 (9.8ma/13.4ma)
(!!!) (Recommended Single) 12AT7 GE NOS 1981 (7.0/6.8ma)
(!!!) (Single) 12AT7 GE gray plate NOS 1975 (8.4ma/6.8ma)
(!!!!) (Best Pair) 12AT7=6679 GE gray plates NOS (9.5/10ma and 9.8/10.5ma)
(!!!!) (Best Pair) 12AT7=6679 GE gray plates NOS 1977 (7.5/9ma and 7.7/9ma) 1-2% matched
(!!!) (Best Single) 12AT7=ECC81 Siemens Halske Germany branded Telefunken NOS 1961 (8.5ma/9.4ma)
(!!!) (Best Value Single) 12AT7=ECC81 Siemens Halske Germany branded Telefunken NOS 1961 (12.2ma/10ma)
(!!!) (Single) ECC81=12AT7 Siemens Halske branded Mullard like new 1966 (8.2/7.4ma)
(!!!) (Best Single) 12AT7=ECC81 Siemens Halske Germany branded Telefunken Tektronix Checked NOS 1970 (8.6ma/9.8ma)
(!!!!) (BEST PAIR #2) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (9.0/8.8ma and 8.8/9.0ma) 1-3% matched
(!!!!) (BEST SINGLE #1) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960 (10.6/10.6ma) 1-2% section balance
(!!!!) (BEST PAIR #4) JG-12AT7WA=6201 GE NOS "blue tip - red dot" triple mica, "O" getter halo, gray plates 1960-1961 (8.4/7.2ma and 8.0/7.8ma) 1-5% matched
(!!) (Best Value Single) M8162=CV4024=12AT7WA Mullard UK NOS 1966 (8/7ma)
