(!!!!) (Best Overall Pair) 12SN7GTA Sylvania NOS 1960's same date codes (8.6/9.4ma and 9/10ma)
(!!!) (Recommended Pair) 12SN7GTA GE Canada NOS 1967 (8.6/9.4mA and 8.6/9.8mA)
(!!!) (Recommended Pair) 12SN7GTA RCA coin-base NOS 1972 (7.2/8.2ma and 7.2/8.6ma)
(!!!) (Recommended Pair) 12SN7GTA RCA coin-base NOS 1972 (8.0/8.8ma and 7.6/8.6ma)
(!!!) (Recommended Pair) 12SN7GTA RCA coin-base NOS 1972-1974 (8.6/8.8ma and 8.6/9.0ma)
(!!!) (Recommended Pair) 12SN7GTA RCA coin-base NOS 1972-1974 (9.6/10.6ma and 9.2/10.2ma)
(!!!) (Recommended Pair) 12SN7GTA Sylvania NOS 1960's (9.2/10.2mA and 9.6/10mA)
(!!!) 12SN7GTA GE branded RCA coin-base NOS 1970's (9.2/9.4ma)
(!!!) 12SN7GTA Sylvania branded RCA used/good 1967 (10/12.5ma)
(!!) (Recommended Pair) 12SN7GTA RCA black plates NOS 1969 (8.6/9.0mA and 9.2/9.6mA)
(!!) 12SN7GT RCA Honeywell black plates used/good 1957 (7.6/8.4ma)
12SN7GT RCA coated glass NOS 1950 (7.6/8.6ma)
12SN7GT Sylvania NOS 1960 (7.5/8.0ma)
12SN7GTA GE branded Westinghouse low hours 1960's (7.0/7.4ma)
12SN7GTA GE Honeywell gray plates used/good 1960's (6.0/6.8ma)
