On eBay UK: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=190163311536

  "This is not a conventional Pianola.  It is an 88 Note Roll Playing
  air driven unit which rests on the keyboard of a normal Piano and
  plays it using the air produced by the electrically driven bellows.
  It comes complete with the blower unit and is thought to be quite
  rare.  It is in poor condition with woodworm damage and would need
  restoration."

Has anyone come across one of these contraptions before?  It looks
fascinating!

Roger Waring - The Pianola Workshop
Solihull, West Midlands, UK
http://www.pianola.co.uk/