Magic Pockets are a unique under playfield mechanism, only used on two Bally Bingos in 1955 - Gayety and Gay Time. These bingos allowed you to reposition balls in the top row of the bingo playfield (numbers 1-7).
If this wasn't enough, these machines also had the magic lines feature that allowed you to reposition numbers on the backglass. This allowed for the ability to make some great winning combinations.