I'm currently in the middle stages of restoring one myself. I don't have high expectations but suspect the amp running at %100, with a good speaker and some caninet acoustic tweaking, it might be a winner.
Strictly for home personal practice use... plenty loud for that, not much else.
Mine is a 10" speaker not a 12"
I'll have to get back to you on whether it was worth it. Mine had a really ratty non original speaker in it, I purchased an Eminence S-2010 for it.
From a tone standpoint? I can't say yet, with the speaker it came with, sounded very boxy but I'm pretty sure it's a generic guitar speaker that's also probably pretty beat up.
From a cost standpoint?
I'm having it get a new power cord, new input jacks and new speaker wires + whatever else tests bad on the bench.
Whatever the above ends up costing + $40 for the amp + $75 (no tax or shipping paid on either) will be the cost from a tone standpoint.
I also cleaned up the amp, bought new corners, grill cloth, logo and some Polyfill stuff and a port tube for the already present vent. The last two items may or may not end up being used....I'll experiment with that.
All in all the entire cost of the project will come in under $300
When I'm done I'll compare it to my $200 Orange Crush 35 and see which one wins.
I'll tell you this much....you don't see caps like this in SS amps anymore. Bumblebees!!