Ok good to know. I suppose that it could be a strike through of a small metal(?) fragment, but with this amount of circulation wear, I'd sooner believe that it is just a weird impact from something. At least from the pics, there doesn't appear to be flattening on the other side nor "smushing" up of any metal around this area, so it is hard to know for sure.
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"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz