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(!) 12AU7A Sylvania NOS 1960 (10/10.1ma) 1-2% section balance
(!) ECC82=12AU7 Valvo Holland used/good 75-90% 1968 (7.8/9.0ma)
(READ REVIEW) 12AU7 RCA black plates "D" getter mid-1950's used/tests like new (9.8/11.4ma)
(slightly microphonic tube) 12AU7A RCA tall black ribbed plates "D" getter halo used/good 1950's (8.2/8.8ma)
12AU7A Sylvania Dumont NOS 1960's (10/8.8ma)
