I bought a 512k at a 2nd hand store years ago. Unfortunately "as is" meant "not fixable".
This page represents it's ultimate fate.
The crank winds a music box clockworks that plays (of course) "It's a Small World" [midi] and rotates the small wooden doll holding a singularly inappropriate gold plastic electric guitar.
The doll was purchased at a Chicago area Walgreen's store and is, to this very day, the strangest Christmas tree ornament I have ever seen.