Wurlitzer Style 33-A PianOrchestra
Philipps Pianella Model 33
(Hanulec/Kehoe collection, circa 1998)

This frontal view shows the electric motor in the bottom, with the vacuum reservoir located directly behind it. To the immediate right of the vacuum reservoir is the regulating spill valve for wind-pressure, held closed by two flat steel springs.

On the shelf above the motor the bass end of the main valve chest or stack can be seen. The small wooden dowels on the pneumatic stack (just below the piano action) push up against the piano action whippens, causing a note to sound.

At the middle left is a standard Wurlitzer coin-trip accumulator, which credits and debits up to twenty coins. Notice the absence of a coin chute, as this and most large PianOrchestras were generally operated by remote wall boxes.