Potential Error On 1986-P Dime

I saw this while roll searching, where my attention was immediately caught by the thin edge that seemed to lack all reeding. I pulled it out thinking it'd be the most worn dime in the world but instead got this oddball.



There's a substantial loss of detail on the obverse, and the rims are incomplete to the point of swallowing up details on the coin, most notably the date. There is a decent amount of luster on the low points. The coin appears to be thinner (though not substantially smaller in diameter) and the reeding is only just slightly apparent at high magnification.

I've seen enough die wear, worn coins, and greasy dies to not think it's any of those, but what it is I have no idea. Opinions are welcome.