new lower pricehere is a lot of 3 tube testers I believe one is a military, please check them out because I do not know much about this subject one thing I can tell you the do have bad odor I believe mild due or mold from being locked closed for many many years, they do look really really COOL I do not know how to test them so UNTESTED, please look at the pictures they are a part of the description, I got them in a live sale that was heldhere in Chicago belonged to a 97years old collector there were more of them but I did not offer because to rich for my pocket, I will have some more stuff from his collection, check my \"other stuff\" some DISC RECORDERS AND WIRE RECORDERS I think about 75 years old stuff (not sure), these are really cool and conversational pieces, there are some other accessories that are in the comparaments of the units , they are sold as is as described,NO RETURNS, {{you can return them only if you realize that they are worth $10000.00 JUSTkidding}}

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