They're multipying
I first posted here for help restoring my late father-in-law's Royal HH only a couple months ago. Now I've gained a Smith-Corona Sterling and today another Royal HHP! My wife found it in a secondhand shop for $9 and checked it all over - It was mechanically good, every key worked, everything worked, and it even included the cover. We figured $9 was a good buy even if there was a hidden issue, since it could just be a parts machine for the prior Royal, but instead I just finished washing the dirt off of it and it's surprisingly excellent.
But now I have three typewriters...
Anyway, enjoy the Before/After pics of the cleaning. I'm off back to Ribbons Unlimited I guess, since the ribbon that came in it is pretty dried out and I assume there's no way to resuscitate one.