(!!!!) (Best GE Pair) 12SN7GTA GE side getter NOS 1974 (9.4/10.6ma and 9.6/10.6ma) 1-2% matched
(!!!!) (Best Sylvania Pair) 12SN7GT Sylvania chrome top NOS 1956-1957 (8.8/9.4ma and 8.4/9.8ma)
(!!!) (Best GE Pair from 1957) 12SN7GTA GE Motorola side getter NOS 1957 same date codes (7.0/7.2ma and 7.0/7.6ma)
(!!!) (Best Single from 1951) 12SN7GT GE parallel black ribbed plates 1951 (7.6/8.4ma)
(!!!) (Best Single) 12SN7GT Sylvania chrome top NOS 1953 (9.4/9.4ma) 1% section balance
(!!!) (Recommended Pair) 12SN7GT RCA black plates NOS 1953-1959 (8.2/8.6ma and 7.7/8.2ma)
(!!!) (recommended Pair) 12SN7GT RCA black plates NOS 1960 (7.5/7.7ma and 8.0/8.4ma) (same Gm)
(!!!) (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 (9.6/10.6ma and 9.2/10.2ma)
(!!!) 12SN7GTA GE branded RCA coin-base NOS 1970's (9.2/9.4ma)
(!!!) 12SN7GTA Sylvania branded RCA used/good 1967 (10/12.5ma)
(!!!) Best Single from 1946) 12SN7GT Ken Rad NOS staggered black ribbed plates 1946 (12.6/12.8ma)
(!!) (Recommended Pair) 12SN7GTA RCA black plates NOS 1962 (8.6/10.6mA and 8.6/9.8mA)
(!!) 12SN7GT GE side getter NOS 1953 (7.6/8.2ma)
(!!) 12SN7GT RCA Honeywell black plates used/good 1957 (7.6/8.4ma)
(!!) 12SN7GT Tungsol tall bottle NOS 1957 (7.0/7.4ma)
(!!) 12SN7GTA Tungsol NOS 1960 era (9.2/9.8ma)
12SN7GT RCA branded CHIEF NOS 1963 (8/9.2ma)
12SN7GT RCA coated glass NOS 1950 (7.6/8.6ma)
