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(!!!!!) (Best Single #1) 12BH7 Super Radiotron Australia gray ribbed plates NOS 1960's (10.8/8.9ma) (similar sound to RCA) (McIntosh, VTL, Manley, Quicksilver)
(!!!!!) (Single) 12BH7 Super Radiotron Australia gray ribbed plates NOS 1960's (9.8/14.2ma) (similar sound to RCA) (McIntosh, VTL, Manley, Quicksilver)
(!!!!) (Best Single #3) 12BH7A RCA NOS 1971 (8.8/12ma)
(!!!!) (Single 1950's) 12BH7A RCA branded Westinghouse narrow black plates NOS "U" getter mid-1950's (10.6/7.4ma) (1st series made)
(!!!!) (Single) 12BH7 Tungsol branded Shield gray oval plates "U" getter halo NOS 1961 (11.8/16.5ma) (Highest mA and Gm)
(!!!!) (Single) 12BH7A GE gray oval plates 1962 (6.6/9.6ma)
(!!!!) (Single) 12BH7A GE gray oval plates NOS mid-1960's (11.5/16ma)
(!!!!) (Single) 12BH7A Sylvania gray oval plates "O" getter NOS 1960 era (10.4/7.6ma)
(!!!!) 12BH7A Westinghouse gray ribbed plates used/good "U" getter 1960 era (8.4/11ma)
(!!!) (Best Single 1956) 12BH7A GE gray oval plates NOS "U" getter 1956 (10/9.8ma)
(!!!) (Single) 12BH7 Raytheon Oval Black Plates "D" getter used/good 1950's (7/6.5ma)
(!!!) (Single) 12BH7A CBS Oval Black Plates "O" getter used/good 1960 (7.3/9.6ma)
(!!!) (Single) 12BH7A Raytheon Black Oval Plates "D" getter NOS 1950's (10.6/7.8ma)
(!!!) (Single) 12BH7A RCA NOS 1970's (16.4/9.6ma)
(!!!) (Slightly microphonic Single) 12BH7A CBS Oval Black Plates "U" getter NOS 1960 era (8.4/9.0ma)
(!!!) 12BH7A GE gray oval plates NOS "o" getter 1964 (11.4/10.2ma) (strong Gm)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!) (Best Single) 12BH7A Channel Master Japan by Hitachi 1959 (14.2/13.2ma) (McIntosh, Quicksilver, Art Audio, Wells)
(!!) (Best Single) 12BH7A Westinghouse Canada ribbed plates NOS 1967 (12.2/14.2ma)
(!!) (Single) 12BH7 GE Delco gray oval plates "U" getter NOS 1950's (7ma/8ma) (Quicksilver, Wells, Doshi, McIntosh)
