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(!!!!) (Pair #5) 6F6G Marconi Spain NOS 1949 (31.6ma and 32.0ma)
(!!!) (Best Pair) 6F6GT GE coated glass NOS 1951-1952 (36ma and 39.5ma)
(!!!) (Best Pair) 6F6GT Sylvania and Sylvania Philco NOS 1950-1952 (40ma and 41.5ma) (close Gm)
(!!!) (Best Pair) 6F6GT Sylvania branded GE NOS 1962-1964 (39.5ma and 41ma) (close Gm)
(!!!) (Best Single) 6F6G Tungsol NOS 1950 (37.2ma)
(!) 6F6G Sylvania Philco NOS 1949 (36.5ma)
(!) 6F6G=VT-66A Sylvania used/tests like new 1940's (45ma)
(!) 6F6GT GE Coronado NOS 1956 (36.8ma)
(!) 6F6GT Sylvania Philco NOS 1950 (43.5ma)
6F6G National Union black plate NOS 1951 (40.5ma)
6F6G National Union used/good mid-1940's (47ma)
6F6G RCA Cunningham used/good 1947 (31ma)
6F6G RCA NOS 1949 (35.8ma)
6F6G RCA NOS 1957 (37ma)
6F6G RCA NOS 1957 (42.2ma)
6F6G RCA Victor used/75% 1940's (28ma)
6F6G RCA Victor used/strong 1940's (37ma)
6F6GT GE NOS 1952 (32ma)
6F6GT Sylvania used/good 1949 broke off guide pin (32ma)
