It was a Bluthner baby grand piano, made
mostly of aluminium and covered with pigskin,
Your best bet is
for more info.
I have tried the above address without success, but a search for Bluthner
yielded the following page, which includes a one or two sentence reference to
the piano in question in a general history of the company.
http://www.bluthnerpiano.com/index2.html
Rick Wilson
RWilson447@aol.com