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12SJ7 RCA metal can NOS 1950's (2.8ma)
12SJ7 RCA NOS 1961 (3.0ma)
12SJ7 Tungsol metal can NOS 1949 (3.3ma)
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)
