Some years ago I watched an MBSI(?) video and it showed a doorbell at
a fair.  It was being sold _new_ and was made of a pneumatic which was
pulled down on a cord with three to five small pipes on top so it
produced a sound like a steam engine whistle when the cord was pulled.

Does anyone have a photo of other details?  We have some organ pipes
here and would like to try to make one.

Kevin McElhone - Northants, UK