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(!) (slightly microphonic) 6072 GE branded RCA triple mica black plates "O" getter halo 1960 used/good (2.0/2.0ma)
(!) 5751 GE gray plates double mica used/good 1970's no printing (2.0/2.3ma)
(!) 5751 GE gray plates double mica used/very good 1960's no printing (2.2/2.1ma) (strong Gm)
(sold out) 6414 Raytheon triple mica black plates NOS 1950's misbranded E80CC National
JG-6189=12AU7WA GE triple mica NOS 1963 (8.6/10.4ma)
