(!!!) 6DE7 GE Canada black plates NOS 1967 (4.6/42ma) (Woo Audio)
(!!!) 6DE7 Sylvania black plates "U" getter NOS 1950's (8/31ma) (Woo Audio)
(!) 6DE7 GE Admiral black plates NOS 1965 (4.5/27ma) (Woo Audio)
6DE7 RCA NOS 1960's (4.5/34ma)
6DE7 RCA NOS 1966 (5.2/40ma)
6DE7 Sylvania NOS 1960's (5.3/27ma)
