(!!!!) (Best Pair #2) 6F6G Marconi Spain NOS 1940's (37.5ma and 39ma)
(!!!!) (Best Pair #3) 6F6G Marconi Spain NOS 1949 (35.8ma and 38ma)
(!!!!) (Best Pair #4) 6F6G Marconi Spain NOS 1949 (35.2ma and 39.4ma)
(!!!!) (Pair #5) 6F6G Marconi Spain NOS 1949 (31.6ma and 32.0ma)
(!!!) (Best Single) 6F6G Tungsol NOS 1950 (37.2ma)
(!!) 6F6GT Tungsol NOS 1953 (37.2ma)
(!) (Best Single) 6F6GT GE NOS 1955 (43ma)
(!) (Best Sylvania) 6F6GT Sylvania chrome top NOS 1956 (41.2ma)
(!) 6F6G Sylvania Philco NOS 1949 (36.5ma)
(!) 6F6G=VT-66A Sylvania used/tests like new 1940's (45ma)
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 (42.2ma)
6F6GT GE NOS 1956 (36ma)
6F6GT GE NOS 1959 (41.5ma)
