(!!) (Single) 12BH7 GE Delco gray oval plates "U" getter NOS 1950's (7ma/8ma) (Quicksilver, Wells, Doshi, McIntosh)
(!!) (SINGLE) 12BH7A Philco by Sylvania gray plates NOS 1967 (10/11.2ma)
(!!) 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 RCA used/good/75% 1967 (7/6ma)
(!!) 12BH7A RCA used/very good 1960's (9.8/11.6ma)
(!!) 12BH7A Sylvania rebranded Westinghouse NOS pinched plates 1960's 1% section balance (7/7ma)
(!!) 12BH7A Westinghouse black plates "U" getter used/good 1950's (6.2/7.2ma)
(!!) 12BH7A Westinghouse ribbed plates NOS 1963 (9.0/10.8ma)
(!) (SINGLE) 12BH7A RCA used/very good 1960's (7.4/9.2ma)
(!) 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)
(slightly microphonic single) 12BH7A Brimar England black ribbed plates NOS 1950's rebranded GE in 1967 (SW) (12.4/14.6ma)
(slightly microphonic) 12BH7 GE Zenith NOS "U" getter 1953 (10.0/10.6ma)
12BH7A Channel Master Japan by Hitachi NOS 1962 (10/14ma)
12BH7A GE gray oval plates used/good "U" getter 1950's (7.6/7.8ma)
12BH7A Matsushita Japan branded Amperex Holland NOS 1970's (8.8ma/9.6ma)
ECC99 JJ (best identical substitute is 12BH7A RCA, Raytheon, Sylvania and GE)
