Christofer Noering commented that the discs for the Nyström Reform
Organ were the same diameter as the Complett Organ, and wondered about
the relationship of their scales.  There's a scale for the 28-note
Nyström Reform Orgel at  http://music.organettes.com/scales/home

Can anyone furnish the scale of the 24-note "Complett Organ"?  I'm
Not familiar with it. It wouldn't establish whether the discs were
Compatible in layout, but at least the scales could be compared.

Todd Augsburger - Roller Organs
http://www.rollerorgans.com/