@Errorists' topic 2020 S Rockefeller National Park Error Quarter - US, World, and Ancient Coins - NGC Coin Collectors Chat Boards inspired me to locate this anomalous 1988-P quarter that I found in circulation some years (probably several decades) ago:     The first (obverse) photo shows a thickened and split rim on the right side. The rim narrows and ultimately vanishes at the left side. The second photo shows a normal reverse, some common "strike doubling" excepted