Wow, I want the whole rig in that picture!!! Fantastic!
I just found http://www.amiga.org/gallery/index.php?n=1603 . This looks genuine.
I now own that particular keyboard and it is indeed the genuine article.
As I recall the keyboard came from a company in the states with some business connnection with Commodore.
I think their intention was to release it as a licensed expansion until the demise of Commodore.
