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(!!!!) (Recommended Pair) 12BH7A RCA gray ribbed plates NOS 1969 (14/9ma and 13/9.5ma)
(!!!!) (Recommended Single) 12BH7A RCA black ribbed plates "D=square getter" NOS 1950's (12.8/10.5ma)
(!!!!) 12BH7A Westinghouse gray ribbed plates used/good "U" getter 1960 era (8.4/11ma)
(!!) 12BH7A RCA used/good/75% 1967 (7/6ma)
(!!) 12BH7A RCA used/very good 1960's (9.8/11.6ma)
(!) (SINGLE) 12BH7A RCA used/very good 1960's (7.4/9.2ma)
ECC99 JJ (best identical substitute is 12BH7A RCA, Raytheon, Sylvania and GE)
