New electrolytic caps, 3-prong cord, replaced a broken potentiometer - pretty standard tune-up on any amp from the 60's. Also had some noisy resistors that I replaced after taking the photos.
The preamp tubes were all on their last leg but the amp had a nice Sylvania labeled Mullard GZ34 and some Realistic branded 6L6GCs, marked "Made in West Germany." Of course Europe never made any 6L6 tubes - they are in fact USSR manufactured 6∏3C-E tubes, which are roughly equivalent to 6L6GC and the basis for the newer Sovtek 5881 tubes. Interesting stuff.