A member of VAMworld who is known to me, and who lurks here at CCF, informed me via email of his worries about this coin. I looked at it, and made my original post, from my smartphone which allowed me a pretty good look but not necessarily a good research base for known varieties.
He made the point that there is no 1883-S obverse known with a Far, Slanted date such as this coin manifests. Further investigation draws one's attention to the 3 in the date, as well as certain serifs of both obverse and reverse lettering and some of the relationships between them.
I have to qualify this opinion by noting that the images do not appear to be perfectly square to the coin, thereby hinting at some possible distortion of the features due to the interesting things digital photography does to perspective. With that said, my informant's points are well made, I see precisely what he's talking about, and I am forced to express doubt as to the originality of this coin.
Let's have a dialogue about this one.