Punched Pennies

A while ago I learned how to use the Addressograph I scored from a folded local paper.
It's a machine that presses characters (addresses) into dog tag like bits of metal that are then put into another machine that prints out the labels for magazine/newspaper subscriptions.
I make 'lucky' pennies, pressing four letter words into pennies for a small fee.
Scanning the pennies, though, is tricky...the words are sunken not raised AND they look way better than this in real life.
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