I had a friend, N7LFF that had a little Palomar 90a just like that, it was a good little amp, his had 2 6LF6`s in it.
They made 6LF6`s in two different sizes Short, and Tall....after all of the supply of short one dried up, most people would make a couple of little spacers to let the top cover sit up a little higher to clear the tubes....looks like this guy took a hammer and "stretched" the case.....that looks ugly.
Worth about $100 bucks...if it was clean, and not even that much after someone beat the cover up
73
Jeff