I have a Pleyel Grand piano… manufactured in 1899… that is “Reverse.” It opens to the left side of the keyboard rather than the right. The keyboard is not backwards, so it plays normally, but the plate is redesigned to allow the “curve” of the piano to be on the bass side.

Any idea what it might be worth?

Pix: http://www.flickr.com/photos/63666289@N04/sets/72157637587250833