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12SF7 RCA NOS some surface rust on metal can 1954 (14.2ma)
12SG7 US Brands metal can used (10 in stock)
12SH7 US Brands NOS (12 in stock)
12SJ7 RCA NOS 1961 (3.0ma)
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)
12SL7GT GE branded RCA NOS 1970's (2.2/2.4ma)
12SL7GT GE NOS 1966 (2.0/2.3ma)
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 branded Westinghouse low hours 1960's (7.0/7.4ma)
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
12SR7 metal can NOS (20 in stock)
12SR7GT National Union NOS 1950 era (10.8ma)
12SR7GT RCA NOS 1940's (11.2ma)
12T10 GE NOS
12U7
13CW4 RCA NOS 1950's - 1970 (5 in stock)
13DR7 Sylvania branded GE NOS (1 pair)
