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(slightly microphonic) 12BH7 GE Zenith NOS "U" getter 1953 (10.0/10.6ma)
(!!!!) (Single 1950's) 12BH7A RCA branded Westinghouse narrow black plates NOS "U" getter mid-1950's (10.6/7.4ma) (1st series made)
(!!!!) (Best Single) 12BH7A GE branded Zenith gray oval plates "O" getter NOS 1960's (11.0/11.3ma)
(!!!) (Slightly microphonic Single) 12BH7A CBS Oval Black Plates "U" getter NOS 1960 era (8.4/9.0ma)
(!!!) (SINGLE) 12BH7A Brimar UK rebranded GE short ribbed black plates 1968 (11/10.2ma)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!!!) (Recommended Pair) 12BH7A Sylvania gray pinched plates NOS 1960's-1970's (9.6/10.8ma and 7.5/11ma)
(!!) 12BH7A Philco Sylvania gray oval plates "O" getter halo used/good 1962 (6.5/7.3ma)
(!!) 12BH7A RCA gray plates used/good 1960's (8.0/11.2ma)
(!!) 12BH7A RCA gray plates used/good 1970 era (8/9ma)
(!!) 12BH7A Westinghouse black plates "U" getter used/good 1950's (6.2/7.2ma)
(!) 12BH7A GE gray oval plates "O" getter halo used/good 1964 (7.2ma/8.5ma)
(!) 12BH7A Toshiba rebranded "Bell and Howell Schools" like new 1960's (9/10.4ma)
(!) (Single) 12BH7A Brimar England branded Realistic black ribbed plates gold pins NOS 1960's (8.5/6.6ma)
(!!!!) (Recommended Single) 12BH7A RCA black ribbed plates "D=square getter" NOS 1950's (12.8/10.5ma)
12BH7A Channel Master Japan by Hitachi NOS 1962 (10/14ma)
12BH7A Matsushita Japan branded Amperex Holland NOS 1970's (8.8ma/9.6ma)
(!!) 12BH7A RCA used/good/75% 1967 (7/6ma)
(!) (SINGLE) 12BH7A RCA used/very good 1960's (7.4/9.2ma)
(!!) (SINGLE 1953) 12BH7 GE NOS gray oval plates "U" getter 1953 NOS (9/12ma)
