(!!!!) (BEST GE PAIR) 7247 GE NOS 1967-1969 (1.6/1.6ma and 9.6/9.8ma) 1-2% matched
(!!!) (BEST GE PAIR) 7247 GE NOS 1967 (1.7/1.9ma and 8.6/9.0ma)
(!!!) (Best Pair) 12DW7 Sylvania NOS 1960's (1.1/1.1ma and 9.8/10.6ma)
(!!!) (BEST SINGLE) 7247=12DW7 IEC Mullard NOS 1965-1967 (1.6ma/12.2ma)
(!!!) (Best Single) 7247=12DW7 Mullard England NOS 1963 (1.9ma/11.8ma) (High Ma and Gm)
(!!!) (BEST VALUE SINGLE) 7247=12DW7 Hammond Mullard UK like new 1966 (1.3ma and 9.6ma)
(!!!) (BEST VALUE SINGLE) 7247=12DW7 Hammond Mullard UK used/like new 1963 (1.1ma and 9.2ma)
12DW7 Sylvania rebranded RCA NOS 1961 (1.2ma/9.8ma)
12DW7 Sylvania rebranded RCA NOS 1961 (1.8ma/9.5ma)
12DW7 Sylvania rebranded RCA NOS 1961 (2.0ma/7.8ma)
7247 Fisher Telefunken Germany <> bottom "RIBBED PLATES" used/good 1964 (.8ma and 10.4ma)
7247 GE NOS 1967 (1.4ma and 9.2ma)
