I just ran into this 1919 Euphona inner player piano. It seems it's
an expression player. What rolls does it use?

I've been in the business a long time, but never actually seen one.
Any other info would be appreciated.

Thank you
Wayne Lincoln
WLC Restorations

 [ It might be a Recordo expression system. See
 [ https://www.mmdigest.com/Archives/KWIC/E/euphona.html