Quoted from Blake:I meant to ask you if you have any info regarding the ‘NRA’ stickers at the top of the playfield? I just picked up a Gottlieb Push Over which has the exact same stickers. Any idea on the story behind them?
National Recovery Act. It's not what you think of regarding the NRA today. If you see this logo on something it dates it to the 1933-1934 era.
https://en.wikipedia.org/wiki/National_Recovery_Administration