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12SJ7 Tungsol metal can NOS 1949 (3.8ma)
12SK7GT RCA NOS 1940's (8.6ma)
12SK7GT RCA NOS 1940's (9.0ma)
12SK7GT Rogers Canada used/tests like new 1950's slightly tilted glass (8.8ma)
12SK7GT Tungsol used/tests like new 1940's, 50% of base is rusted/tarnished (8.6ma)
12SK7GT Wizard by Sylvania used/good 1940's (7.5ma)
12SN7GT RCA branded CHIEF NOS 1963 (8/9.2ma)
12SN7GT RCA NOS 1960 with plate support rods (8.0/8.2ma) 1-2% section balance
12SN7GTA GE Honeywell gray plates used/good 1960's (6.0/6.8ma)
12SN7GTA RCA coin-base branded GE NOS 1980 (12.2/12.2ma) 1-2% section balance
12SQ7 GE metal can NOS 1964 (94/60)
12SQ7GT Emerson by RCA used/good 1940's (90/60)
12SR7 metal can NOS (20 in stock)
12SR7GT National Union NOS 1950 era (10.8ma)
12SR7GT RCA NOS 1940's (11.2ma)
12V6GT Sylvania chrome top NOS 1957 (58ma)
12V6GT Sylvania used/good 1960's (38.6ma)
12V6GT Tungsol branded Raytheon NOS 1960's (62.5ma)
12W6GT used/good (5 in stock)
12Y4 Marconi NOS
