In the words of the J.P. Seeburg Company in a letter to someone
  that asked for a tubing diagram in the 1920's for a KT Special:
  "We have no diagram.  Enclosed is a blueprint for the style G
  tracker bar.  We trust you can figure out the rest."

This is from the book by Reblitz and Bowers, "Treasures of Mechanical
Music".  I am amazed how many times I have emails from people requesting
a tubing diagrams for different coin operated pianos.

I am glad there is interest out there but I'm sorry to report that
there just is not a tubing diagram covering coin pianos.  If there was
it would most likely be wrong for the piano you have.

Don Teach
Shreveport, Louisiana