This is my collection of vacuum tubes, these were all given to me and are original. For a very long time Iv'e wanted some vacuum tubes and then my mom brings home a big box full of them and now I'm very happy! most of them are from Sylvania, then RCA, then realistic lifetime tube, GE, and a few others. I believe most of these still work, when unboxing them, I only saw two that were labeled bad, I wish I had a way of testing them without ruining them. I was a bit dissapointed that the boxes or tubes didn't have dates on them except for one that said 11/59.