From John C Kleinbauer:
How to Build a Simple Mechanical Organ is the only booklet of it’s kind in the world! The booklet is a Step-By-Step guide showing how to build a small Monkey style Crank Organ using a set of reed plates from a harmonica.
Web link of note: Make Your Own Crank Organ
(At http://www.crankorgan.com/crank.htm)