Have you seen the web page at
http://www2.netdoor.com/~rlang/knabe.htm ?????
This is a really ambitious web-page with lots of pictures, music, an
animation, and some folks who must have had incredible amounts of time.
These guys aren't pianists or tech, but undertook to do this restoration
anyhow. It's well worth a look.
Lesie
lesbart@juno.com
or
lwbartlett@pdq.net
This PTG archive page provided courtesy of Moy Piano Service, LLC