My uncle says he has a couple of boxes of old tubes. I've happened on this sort of situation before, but it turned out most of them were irrelevant to my amps Vibrolux Reverb 68 Custom (6L6, 12AX7, 12AT7, 5AR5) and a Blues Junior IV (EL84, 12AX7). Is there a cheat sheet anywhere that lists the other names of these tubes over the years so I can make a decision about whether to make the drive to get them? Surely I am not the first person on this mission! Thanks for any help.