HERE IS A VERY NICE PAIR OF RCA 12AX7 VACUUM TUBES. THERE ARE THE LONG GRAY PLATE VERSION WITH THE TOP MOUNTED BENT RECTANGULAR GETTER. BOTH TEST EXCELLENT AT 100% FOR EMISSION ON BOTH TRIODES WITH NO SHORTS OR GRID LEAKAGE. TESTED ON A B&K 600 TESTER. MFG AND DATE CODES ARE 274/58-49 AND 274/59-17. LATE 1958 AND EARLY 1959 VINTAGE. BOTH HAVE BALDWIN ORGAN LOGOS. VERY NICE PAIR OF RCA 12AX7 TUBES. BUYER PAYS SHIPPING.