Quoted from PinPilot:I've never understood that either. Perhaps the slogan was in use during WWI? Or Bally had Nazi sympathizers in the art department?
Strange.
Occam's Razor: the simplest explanation is usually the correct one. QED, they screwed up
My understanding is that about half the yield had the slogan, and they eventually realized their (Massive!!) mistake, and removed it. My uncle has a Mata Hari with the slogan - I think it is an EM.