(!!) (Best Overall Single) 7247=12DW7 GE NOS 1970 (1.3ma and 13.6ma) (Highest Ma and Gm)
(!!) 7247=12DW7 GE branded Westinghouse "U" getter used/good early 1960's (0.7ma and 8.6ma)
(!!!) (BEST PAIR) 7247=12DW7 CBS gray ribbed plates NOS 1960 (1.0/10ma and 1.1/9.5ma)
(!!!) (Recommended Pair) 7247=12DW7 Mullard England rebranded Hammond and Bogen 1965-1970 (1.2/10ma and 1.1/10ma) (1-3% matched)
(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates NOS 1960's (1.0ma and 10.4ma)
(!!!) 12DW7=7247 CBS ribbed plates NOS 1960 (0.9ma/11.4ma)
(!!!) (Best Mullard Pair) 12DW7=7247 Mullard UK rebranded Magnovox and Bogen like new 1965-1971 (1.1ma/12ma and 1.3/11.5ma) (sweet sound)
(!) (Best Single) 7247=12DW7 Amperex Globe Logo by Matsushita Japan NOS 1967 similar sound to Mullard (1.5ma and 11.6ma) (High mA and Gm)
7247 GE NOS tall gray ribbed plates 1970's (1.1ma and 9.4ma)
12DW7 Sylvania branded Tungsol NOS 1960's (1.3/9.2ma)
7247=12DW7 GE branded RCA used/good 1960's (0.8/9.3ma)
7247=12DW7 EICO MULLARD UK used/good 1962 (0.7/9.2ma)
(!!!) (Best Value Single) 12DW7=7247 Magnovox Mullard UK used/good 1963 (0.9ma/13.6ma)
(!!!) (2nd Best Mullard Single) 7247=12DW7 Hammond Mullard ribbed plates like new 1964 (1.0ma and 11.8ma)
(!!!) (BEST PAIR #2) 7247=12DW7 CBS gray ribbed plates NOS 1960 (0.9/9ma and 1.0/9ma)
