(!!) (PAIR) 6CM7 Sylvania NOS 1960's - 1970 (5.5/6.6ma and 24.6/26ma)
6CM7 RCA NOS 1960's (4.6ma and 17.5ma)
(!!) (BEST PAIR) 6CM7 GE NOS 1960's (5.7/5.9ma and 21.2/21.6ma)
(!!) (Recommended Pair) 6CM7 GE NOS 1960-1961 (4.3/4.2ma and 18.5/17.2ma)
(!!) (Recommended Pair) 6CM7 GE NOS 1964-1966 (5.1/4.3ma and 16.5/16.6ma)
6CM7 GE NOS 1974 (4.4ma and 19ma)
6CM7 RCA black plates NOS 1956 (4.3ma and 22ma) (rare)
6CM7 GE Zenith NOS 1969 (7.5ma and 25ma) (highest mA and Gm)
6CM7 Westinghouse Canada NOS 1960's (5.0ma and 16.6ma)
(!) (BEST SINGLE) 6CM7 RCA NOS 1960's (6.5ma and 21.6ma)
(!) (BEST SINGLE) 6CM7 RCA NOS 1972 (5.2ma and 20ma)
