Just read this article on a railroad forum and I copied the
mechanical music part from the Orange County Register newspaper:

http://www.ocregister.com/articles/knott-740497-park-auction.html 

  "Knott's is getting rid of a lot of their history and the silver
  lining is that it will go into the hands of those who care," said
  Eric Lynxwiler, co-author of "Knott's Preserved," who said he is
  interested in many of the items.

  Walter Knott built up an extensive collection of coin-operated
  player pianos enjoyed by visitors.  But those who knew how to fix the
  aging instruments have left or died.  More than a dozen are included
  in the auction, along with a number of the rolls of heavy paper that
  provided the music.

  Ken Stack has collected several Knott's items for a theme park
  museum he is planning near Temecula.

  "Knott's Berry Farm was a park I grew up with," he said.  "I hope
  some of the items can go to good homes like ours, a museum where
  people can come and visit to see the pieces they recall."

  Heritage Auctions expects to have ready a catalog of all the items
  available in late February.  The auction is planned for late March in
  the park's Charles M. Schulz Theatre, but a date has not yet been
  announced.  Those interested will be able to view the items for one
  week prior to the auction, Lentz said.

One of the items listed is a Model 'T' Ford; I think that it's Walter
Knott's 'T' that used to be on display next to the original fruit stand.
Many decades ago, when I was there, the engine could still be cranked
over.  (I probably wasn't supposed to do that!)

David Dewey