I posit it had tape pieces or adhesive residue covering an already well-worn coin. When the debris is removed/washed off you have the result you see. …IMO…Spark
Thanks guys! I figured it was post mint but it looks so cool and clean, in person that it didn't look like it could be circulated. Oh well. I'm going to still hold onto it for now
You can see the rims are worn like the obverse face, so it was most likely press against something rotating such as in a dryer drum ( common) to someone with a need for a rotating pivot point. I once saw a pair of dancing shoes in a used stuff store that had a couple of coins glued to the bottom of each for tap dancing I guess. Jim