There are at least two Welte theatre organs with roll-playing mechanism
still existing:

- Landesmuseum fr Technik und Arbeit Mannheim (originally in
  the Scala-Theater, St. Gallen, Switzerland, 1929)

- Siegfrieds Mechanisches Musikkabinett, Rdesheim (orginally in
  Metropol-Theater, Bonn, Germany, 1929)

Kind regards from the hometown of Welte,
Gerhard Dangel
Augustinermuseum, Freiburg