Three matching tubes branded Amperex but they are relabeled USA made tubes. The other tube has a side getter. The Amperex tubes look like they have seen very little use. These were taken out of a working vintage amp about 20 years ago. My Hickok TV7-D/U cannot test this 9 pin tube without a special adapter which I don't have so I an unable to test. I guarantee all my tubes so if these don't perform to your satisfaction I will issue a refund but I am reasonable sure these test are in good order. Good luck and have fun!