This game was part of Williams/Midway's "SuperPin" line of widebody games. Artist Greg Freres said at Chicago Expo 2017 that examples of this game may have plastics with the word "shields" misspelled as "sheilds". We do not know where on the game this mistake would be found and have no picture examples of it. An earlier example of a game with two spiral habitrails is Chicago Vending Company's 1934 'Three Point'.