Unusual types of gramophone records

The overwhelming majority of records manufactured have been of certain sizes (7, 10, or 12 inches), playback speeds (3313, 45, or 78 RPM), and appearance (round black discs). However, since the commercial adoption of the gramophone record (called a phonograph record in the U.S., where both cylinder records and disc records were invented), a wide variety of records have also been produced that do not fall into these categories, and they have served a variety of purposes.

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