6CS6 RCA NOS (2 in stock)
6CS7 GE branded Tungsol NOS 1961 era (21/11ma)
6CZ5 GE Canada black plate NOS 1969 (49ma) (Same build as RCA)
6CZ5 RCA black plate short bottle NOS 1960 (50ma)
6CZ5 RCA black plate short bottle used/good 1960 era (41.5ma)
6CZ5 RCA gray plate 1970's like new (48ma)
6D6 RCA Cunningham used/tests like new 1930's (73/40)
6D6 Sylvania NOS small 1/8" glass chip inside tube at bottom
6D6 Sylvania sealed NOS 1940's (5 in stock)
6D6 US Brands used/good (2 for $8)
6D8EG Philco NOS (1 in stock)
6DC6 US Brands used/test like new (0 in stock)
6DE4 Sylvania used/like new (1 pair)
6DE4 Tungsol NOS 1960's
6DE6 US Brands NOS (10 in stock)
6DE7 GE NOS 1960's (6.5/36ma)
6DE7 RCA NOS 1960's (4.5/34ma)
6DE7 RCA NOS 1966 (5.2/40ma)
6DE7 Sylvania NOS 1960's (5.3/27ma)
6DF6 NOS
