This is a full-size 1:1 scale LEGO model of a 1980 Yamaha A-55N Electone Organ
using approximately 15000 bricks with features including:
  Actionable spring-loaded keys and pedals
  Actionable expression pedal
  Moving lever switches on upper manual
  Tiltable music rest
  Tiltable top & racks for service access

More pictures and info here:
http://equinoxe.byethost16.com/lego/yamaha-organ/
http://www.youtube.com/watch?v=Aj4AUgJApys
http://www.mocpages.com/moc.php/321405
https://www.flickr.com/photos/71148741@N05/sets/72157629453096346