(!!) (Recommended Pair) 6J7 GE and Sylvania made in Holland and England NOS same build 1970's (1.8ma and 2.0ma)
(!) 6J7GT Sylvania NOS 1951 (2.1ma)
(sold out) KTZ63=6J7G Marconi UK NOS 1940's - 1950's
3.5.22 (!!) (Best Value Pair) 6J7 RCA used/test like new 1959-1967 (1.9ma and 2.0ma)
6J7 GE NOS 1957 (2.0ma)
6J7 RCA used/good 1961 (1.8ma)
6J7 Sylvania metal can used/good (2.0ma)
6J7 Sylvania used/good 1960 era (1.7ma)
