(!!!) 12SN7GTA Sylvania branded RCA used/good 1967 (10/12.5ma)
(!!) 12SN7GT RCA Honeywell black plates used/good 1957 (7.6/8.4ma)
(!!) 12SN7GTA GE branded RCA coin-base NOS 1970's (9.2/9.4ma)
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)
