HERE IS A VERY NICE AMPEREX BUGLE BOY ECC81/12AT7 VACUUM TUBE. THIS TUBE TESTS EXCELLENT AT 100% FOR EMISSION ON BOTH TRIODES WITH NO SHORTS OR GRID LEAKAGE. TESTED ON A B&K 600 TESTER. ETCHED NUMBERS ARE Tk2/^0D. HOLLAND MANUFACTURE. SMOOTH GRAY PLATES AND TOP MOUNTED D SHAPED GETTER. AUDIOPHILE GRADE 12AT7 VACUUM TUBE. LOGO IS EXCELLENT. VERY NICE TUBE. FREE U.S. SHIPPING.