(!!!!!) (BEST RCA PAIR) 12AY7 RCA NOS gray plates 1971 same date codes 1% matched (2.4/2.5ma and 2.4/2.5ma) (Fender, Apex, Clark, Leak)
(!!!!!) (BEST RCA PAIR) 12AY7 RCA NOS gray plates 1972 same date codes (2.4/2.4ma and 2.4/2.7ma) (Fender, Apex, Clark, Leak)
