(!) (Best Single) 6AS7GA RCA black plates NOS 1972 (114ma and 127ma)
6AS7GA GE black plates NOS 1963 (107ma and 84ma)
6AS7GA GE NOS 1970 era (77ma and 82ma)
6AS7GA GE NOS 1979 (105ma and 126ma)
6AS7GA Sylvania branded RCA NOS 1983 (100ma and 125ma)
6AS7GA Sylvania metal base NOS 1960's (77/87ma)
6AS7GA Westinghouse like new 1967 (67ma and 71ma)
