There are two examples of this add-a-ball version pictured here. The backglass has no replay window. In reference to the second game (images attributed to Kevin Hawrey), the backbox has the replay wheel removed from the replay unit. This unit normally has a white tag indicating 'Replay Unit' but the word 'Replay' has been scratched out. The instruction and score cards that were with this game were copies obtained from someone who owned the replay version therefore they were removed from the game before pictures were taken. The owner of this game reports additional information about it: I cannot confirm [if only one added ball earned per ball in play] because the AAB feature on my machine is not working correctly. Meaning when I set the AAB feature on the AAB light lite always stays lit and the game will stay on ball 1 'forever'. Please note: this machine has a match feature as you can see the 0123456789 on the backglass. There is a jack in the machine as well to turn the match on or off. I cannot confirm if the match feature actually works on the AAB model because even when the match feature is on, the machine never matches. The credit unit does not function and I'm not sure if it was ever meant to. It is all wired up and there was factory grease on the stepper. The replay version of this game is Chicago Coin's 1964 'Royal Flash'.