(!!!) (Best Pair) 6SK7 GE NOS 1969 (9.0ma and 8.8ma)
(!!) (Recommended Pair) 6SK7 Sylvania NOS 1950 era (9.2ma and 9.0ma)
(!) (SET OF 3) 6SK7 RCA used/good 1940's (7.5ma/7.8ma/7.8ma) (good value)
6SK7 FM Co. by GE used/good 1951 (9.6ma)
6SK7 GE metal NOS 1977 in Sylvania box (8.2ma)
6SK7 Ken Rad NOS 1943 (9.6ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SK7GT Sylvania Coronado used/good 1940's (7.2ma)
6SK7GT Sylvania FM Co. used/good 1940's (8.2ma)
6SK7GT Sylvania used/good 1940's (7.3ma)
JAN-CG-6SK7WA GE metal can like new 1956 (9ma)
