1950's RCA USA 12AU7 ECC82 LONG-BLACK-PLATE D-GETTER MUSEUM CERTIFIED HOLY-GRAIL
12AU7 = ECC82. serving as a desirable ECC82 = 12AU7 tube; representing the best of its kind. REAL N.O.S. RCA USA 12AU7. REAL NOS 1950's RCA BLACK-PLATE 12AU7 TUBE. ex·em·pla·ry NOS RCA 12AU7 D-GETTER LONG.