Here's another view of it: http://www.gettyimages.com/detail/3359446/Hulton-Archive http://www.gettyimages.com/detail/3359446/Hulton-Archive The Popular Mechan

Here's another view of it: http://www.gettyimages.com/detail/3359446/Hulton-Archive http://www.gettyimages.com/detail/3359446/Hulton-Archive The Popular Mechanix article says the message will stay in view 'at least two hours', while the Getty Images caption says 'up to two hours'. By the looks of it the latter seems more likely - pump enough coins into the machine and you can make earlier messages roll out of view!