HERE IS A NICE PAIR OF SYLVANIA ECC81/12AT7 BLACK PLATE VACUUM TUBES. THESE TUBES BOTH TEST EXCELLENT AT 100% FOR EMISSION ON BOTH TRIODES WITH NO SHORTS OR GRID LEAKAGE. TESTED ON A B&K 600 TESTER. DATE CODES ARE B1/JAY AND CC/JTV. SHINY BLACK PLATES AND TOP MOUNTED HALO GETTERS.TUBES ARE IDENTICAL CONSTRUCTION. GREAT VINTAGE AMERICAN TUBES. BUYER PAYS SHIPPING.