YOU ARE BIDDING ON A VINTAGE AMPEREX BUGLE BOY ECC81/12AT7 TUBE TESTED STRONG. THIS TUBE TESTED STRONG ON MY B&K MODEL 700 DYNAMIC MUTUAL CONDUCTANCE TUBE TESTER AS SHOWN. PLEASE LOOK AT ALL PHOTOS AND ASK ANY QUESTIONS YOU MAY HAVE. REMEMBER THAT I SELL MOSTLY ANTIQUE AND VINTAGE ITEMS AND THAT THEY ARE MOSTLY LIKELY NOT BE PERFECT DO TO THE NATURE OF THEIR AGE. IF YOU HAVE A PROBLEM PLEASE CONTACT ME BEFORE LEAVING FEEDBACK.