Although the mintmark area has been holed through, I ran it through Gerry Fortin’s web-book. As many of you know, coins from the western mints in this time period often come mutilated. Only one die pair was used to strike 1870-S dimes. This die pair has: 1) A broken/weak top of the first S in STATES 2) Lathe lines in Liberty’s gown - most prominently just to the right of the shield 3) Misplaced date punches in the denticles 4) Unique date position, farther right than any 1870 Philadelphia issue 5) Very weakly impressed ONE DIME on the reverse This coin exhibits all five of these features. It is unmistakably an 1870-S. This would be a $900 coin problem-free, and it’s probably worth more than $25, but I’m not sure by how much. Perhaps ANACS would be able to slab it if I really wanted to and identified the Fortin variety? If they can slab 1916 SLQs with the date completely worn off based on die characteristics, I don’t see why this would be beyond authentication. Hope this thread at least proved interesting, even if coins like this aren't your cup of tea.