[ Bob Yoder wrote in 180810 MMDigest --

> But I also have five rolls from a mysterious "HS" Schutzmarke
> (copyright notice), made in Germany.  The cut seems specific,
> and some rolls have square punches.

The roll Bob Yoder is asking for details about is a "Virtuola" roll
for the Römhildt [Roemhildt] Virtuola piano made in Weimar.  The
Virtuolas were built both as electric and pedal operated pianos.
The rolls are partly played by artists and have coding for dynamics.

Hans Schmitz
Stuttgart

 [ MMD articles about the Roemhildt Virtuola (Melodia) are indexed
 [ at http://www.mmdigest.com/archives/KWIC/V/virtuola.html 
 [ -- Robbie