12AX7A ECC83 NOS NIB RCA MATCHED PAIR TUBES MUSEUM TESTED "GAME CHANGER" 1963
NOS 1963 RCA 12AX7A. THESE ARE THE "TOP RCA 12AX7A TUBES ANYWHERE"." - Tube Museum New York. (OLDER 1963 RCA PRINT STYLE CONDITION AS DISPLAYED). MATCHED BALANCED NOS PAIR! Made in the U.S.A. in 1963.