Cardboard cab, a little beat up, lots of character. It had already been re-capped, just needed some new tubes, a new power switch, and a 3-pong cord. Also repaired the 15" speaker that was missing its dust cap.
Since both channels were the same, I modified one for a more Fender-y sound. I forgot to take pictures of the guts, but there was no room for an additional speaker jack anywhere and the owner wanted one. So, I installed a small diecast box next to the bottom chassis with a switching jack - plug in an external cab and the internal speaker is automatically defeated.
Very warm tone - not much headroom. The tremolo sounds great.