(!!!) (Mullard Pair) 7247 Mullard Bogen UK 1965 like new (1.3/1.3ma and 11.4/11.5ma) (BEST SOUND)
(!!) (Recommended Single) 7247=12DW7 Hammond Mullard ribbed plates like new 1966 (1.8ma and 10.6ma)
(!!) (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)
(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates NOS 1960's (1.0ma and 10.4ma)
(!!!) (Mullard Pair) 12DW7=7247 Magnovox and Bogen Mullard like new 1965-1971 (1.1ma/12ma and 1.3/11.5ma) (sweet sound)
7247 GE NOS tall gray ribbed plates 1970's (1.1ma and 9.4ma)
(!!) (Best Overall Single) 7247=12DW7 GE branded RCA NOS pinched plates 1970 (1.2ma and 14.5ma) (Highest Ma and Gm)
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)
(!!!) (2nd BEST SINGLE) 12DW7=7247 Magnovox Mullard used/strong 1963 (0.9ma/13.6ma)
