Die abrasion doubling. Sometimes when the dies clash, mint employees abrade the dies to remove the clash marks, and it can have weird effects on the design, sometimes making them appear doubled. Keep up the hunt!
I don't know about causing them to appear doubled but the polishing can have an effect on the width of the letters. On a die the grooves for the letters are like a ditch that is tapered smaller at the bottom than at the top. When the field is polished you're in essence reducing the width of the ditch, making the letter appear skinnier.
:devil:1983-1997 there is a lot that look like this. I am not sure if the Planchet air between copper/zinc?? Maybe the Mint die hub maker. I have a few roll + mint set with cent that look just like this one.
