Kings of Steel March 1984 Bally Pinball Flipper Machine Backbox Backglass. Four Player Solid State, Production: 2,900,Designer: Greg Kmiec, Artist: Doug Watson. Historical, Knights, Cards. Pinball Art USAKings of Steel 1984 Bally$60.00PriceSize*SelectMaterial*SelectQuantity*Add to Cart$60 - $435