With a similar style of the arcade games of days past, the classic jukebox was activated whenever you inserted a coin, usually a quarter, and selected your chosen record, which was listed with its own label of a letter and number combination, such as B12, C36, and so on. Part of the fun of using a jukebox in its heyday was running through the list of songs and seeing if yours made the collection. There was a limitation of the number of songs available, but it felt like hitting the jackpot whenever your favorite songs came on.

Source: Victrola