(!!!) (Recommended Pair) 6CS7 Sylvania branded Raytheon black plates NOS "U" getter halo 1960 era (19/11.5ma and 18/11.3ma)
(!!) (Recommended Pair) 6CS7 Sylvania NOS black plates "U" getter 1950's same build (19/11.6ma and 18/11.4ma)
6CS7 GE Canada NOS black plates 1960's (18/11.2ma)
6CS7 Raytheon by Toshiba Japan gray plates NOS 1970 era (21.5/10.2ma)
6CS7 Sylvania branded RCA used/good "U" getter halo 1950's (18/8.2ma)
(!!) (Best Pair) 6CS7 Sylvania NOS (1) RCA "U" getter (1) Philco "O" getter 1960 era (23/11ma and 23/11ma)
6CS7 RCA branded Westinghouse NOS 1967 (32ma and 10.6ma)
(!!) (RCA Pair) 6CS7 RCA NOS 1962-1965 (17/11ma and 17/12.6ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6CS7 GE branded Tungsol NOS 1961 era (21/11ma)
6CS7 Tungsol branded Lafayette NOS black plates 1960 era (24/12.4ma)
(!!) (BEST PAIR) 6CS7 GE Canada black plates NOS 1964-1970 (20/11ma and 20.6/10ma)
(!!) (Recommended Pair) 6CS7 Sylvania 1956 and Sylvania branded GM Delco "D" getter NOS 1956 with partially wrinkled top getter (19/10.8ma and 18.5/11.2ma) 1-3% matched
6CS7 RCA NOS 1970's (23.6ma and 13.5ma)
