Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. sound device components

Anotations

Scope note:

Spool-shaped cylinders that rotate within music boxes. The cylinders have protruding pins in locations that correspond to the locations of notes on the “combs” of steel prongs, thus plucking the notes on the combs, which also correspond to specific, timed pieces of music played while the cylinders rotate.