Blackface Twin Reverb with a poorly-done "gain mod" in place of the tremolo. It had either a bad speaker, a bad tube, or maybe both. I'm sure I could have had it fixed and it would be worth 4 times what I bought it.
I sold it to help fund a Mesa Boogie Mark III -- which I also don't have anymore. That turned into two months' rent.
I have bad luck with amps, man.