A button on the foot rail with a single letter R on it. In order to score your wins, you
need to push the R-button. On games where you could rearrange winning combinations via
things like the magic screen, you need to push the R-button for every winning combination
you set. The main reason for the R-button was to have more control over when scoring
happened, and it had the nice side effect of reducing wear in the game, as the search disc
was held stationary until the R-button was pushed. On earlier games where the search disc
was rotating constantly, the contacts on the search disc and the search relays would wear
away.
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