Bonjour George,  To know which places with mechanical music you can see
in California, you may have a look at the web pages musica mecanica :
  http://www.musicamecanica.org/

There are over 200 museums in the world mentioned there.  You can also
look at the MBSI web site, http://www.mbsi.org/

Kind regards,
Philippe Rouillé (Paris, France)
http://www.musicamecanica.org/