Interior view of the
Wurlitzer Style 17
(Regular) PianOrchestra
Philipps Pianella Model Special
(Frank Rayle Collection, circa 1975)

The thirteen orchestra bell-bars are mounted horizontally and arranged in a vertical row in the center of the music lyre. The single rank of wood violin pipes can be partially seen behind the snare drum. A single roll mechanism is near the center, with tubing from the tracker-bar fanning out and connecting with the main valve chest. The combination vacuum and wind-pressure feeder pump is at the bottom of the case.