The Polly Portable Phonograph was manufactured by the Polly Portable Phonograph Company of New York around 1925.
The unusual aspect of the Polly is that it does not have reproducer nor a horn. They are replaced by 16” diameter piece of stiff paper with an approximately 45-degree wedge cut out of it. It becomes a horn by bringing the edges of the wedge together and fitting a rivet on one edge into a notch on the other. The result looks something like a small satellite dish. When not in use, the horn folds into thirds and conveniently stores inside the lid.
The paper cone produces a nice tone and has adequate volume.