Since my good friend Matt Caulfield invites me to write, here's some additional information on the 3 known examples of the Style 155 organ. My 155 was located in a skating rink, and it has no original case, just a chassis, since it was built into the wall. The playing mechanism is original, including all the pipework, 100-key spool box, pumps, drums etc.
Some rolls contain a single song and some have two songs.
They're on wooden spools about the same diameter as an 88 note piano roll. I never measured them, but I think that they are not speed compensated. The organ can also play a 165 roll. So, the organ can play either roll without any alteration to the organ other than some tubing. To play the original music, I block off the 165 tracker bar with the music roll, or block off the 100-key bar to play the 165 music.