Recordings of over 30 great Coinola O-Roll tunes played on a Coinola
SO (performing the full range of music arranged for that roll format)
can be found at

http://www.rickcrandall.net/the-music-of-coinola-o-roll-automatic-instruments/ 

Once there, scroll down and either click on the tune name or the
relevant sheet-music cover to play.  There is a broad range of O-roll
music: blues, rags, marches, fox trots, one steps, waltzes and some
novelty/characteristic pieces.

The updated O-rollography is at

http://www.rickcrandall.net/operators-o-roll-rollography/ 

Rick Crandall
http://www.rickcrandall.net/