The photo of the "Gypsy Piano" reminded me of an istrument I witnessed being played at a "Hungarian Church Picnic" as a young boy. It was played with hammers similar to a xylophone. Could this be a similar instrument. My Grandparents reffered to it as a Cymbalene (spelling is my attempt at phonetics).
I remember the guitar, mandolin, and violin music which accompanied the singing and dancing at this affair. It was very much fun to be a part of.