As used in this chapter, "mechanical musical instrument" means and includes any amusement machine, apparatus or device designed or constructed for the purpose of producing, reproducing or playing any musical or vocal tone or tones or combination of tones, the operation or use of which instrument is permitted, controlled, allowed or made possible by the deposit or placing of any coin, plate, disc, token or key into any slot, crevice or other opening in such instrument.
(1952 Code § 25-8-1)