(!!!!) (Recommended Pair) 12SN7GTA GE coin-base side getter NOS 1980 (11.2/9.8ma and 11.2/9.8ma) 1-2% matched
(!!!!) (Best Pair) 12SN7GTA GE coin-base side getter NOS 1980 (10.4/10.4ma and 10.6/10.8ma) 1-2% matched
(!!) (Recommended Pair) 12SN7GTA RCA black plates NOS 1962-1963 (9.0/8.6mA and 8.2/9.6mA)