AstroBoy Online Forums

https://www.youtube.com/watch?v=rpPtdnhNGcQ Wow, this sounds great!
https://www.youtube.com/watch?v=fvTGgNMiQnQ Cheap little toy.
https://www.youtube.com/watch?v=w5FgsiybIj8 An alarm clock!

That first music box version is very pretty!

I'm guessing that the first one was a very expensive disc type music box
Something like this:
http://www.vincentfreemanantiques.com/disk_pages/disk822.htm
They are the only kind with such a long playing time.

Maybe this? (I searched for 鉄腕アトム オルゴール with Google)
http://www.mu-tech.org/dl_market_mbox/JASRAC_054-0021-0_Atom_xf.html
Here is it playing. https://www.youtube.com/watch?v=XR_ng7luI2I