Found an old RCA for $5. NEED SERIOUS ATTENTION tho.

[Valsimot]

Cute little radio. I'm not tube savvy, but the yellow wire should be the antenna (original was most likely lost over the years). You should contact Tom Bavis, he has a respectable collection of tube schematics.

The inside pic shows a few small holes that might have been made by wood worms, but looks to be clean of any now. That could also explain why it was painted. The grill can be fixed with new small pieces of wood and restored to it's original look ("stitches" would be visible though) or maybe with some wood filler (bondo?) but would then have to be painted.