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(!!!) (Single) E81CC=12AT7WA Siemens Munich Germany NOS 1975 (10.8/9.3ma)
(!!!) (slightly microphonic single) ECC801S Telefunken <> bottom rebranded 12AT7/ECC81 Telefunken NOS 1962 (9.2ma/10.2ma)
(!!) (BEST VALUE) 12AT7 Telefunken Germany <> bottom used/tests like new 1960's faded printing (10.6ma/13.0ma)
