Phonograph record

Video of a 1936 spring-motor-driven 78 rpm acoustic (non-electronic) gramophone playing a shellac record.

One standard audio recording handbook describes speed regulators, or governors, as being part of a wave of improvement introduced rapidly after 1897. A picture of a hand-cranked 1898 Berliner Gramophone shows a governor, and says that spring drives had replaced hand drives. It notes that:

Flexi discs were thin flexible records that were distributed with magazines and as promotional gifts from the 1960s to the 1980s.

A dusty/scratched vinyl record being played. The dust settles into the grooves.