Right Side of the
Wurlitzer Style 33-A Mandolin PianOrchestra
Philipps Pianella Model 33
(Hanulec/Kehoe collection, circa 1998)

In the upper section, the bass drum can be seen mounted on the top side of the drum support shelf Which also supports the triangle and castanet actions, while the snare drum and its reiterating action hang inverted just below.

Visible at the top edge of the lower access opening is the orchestra bell assembly, which is partially obscured by the case. The bell strikers hang downward, with the metal bell-bars and resonator box at the bottom side of the assembly.