Emily McParland, of the Montana Heritage Commission, sends this
link to the web page of Nevada City Music Hall, with further
links to a couple of interesting historical papers
including a history of the Bovey Music Machine Collection:

  http://www.virginiacitymt.com/MusicHall.asp 
  "Many of these machines are still in great working order,
  while others are being restored in partnership with AMICA's
  (Automated Musical Instrument Collector's Association)
  Adopt-A-Piano program."

Robbie Rhodes
Mechanical Music Digest