King Pin

King Pin was never actually manufactured - it survives only as backglass artwork by Dave Christensen depicting 1930s-style gangsters, a gun moll, and Chicago buildings. The Bally name does not appear on the art, and no score display windows are drawn in, so it's unclear which manufacturer, if any, was behind the design or whether it was ever seriously considered for production.

Because no machine was built, no gameplay, rules, or feature details exist to describe - only the gangster-themed artwork itself, evoking Prohibition-era Chicago.

As an unproduced concept, King Pin is of interest mainly to collectors and historians of pinball backglass art rather than as a machine that was ever built or played.