There's an error called a 'straight clip' http://www.error-ref.com/_straight_clips_/ But I'm not sure if this is one or not. I don't have enough experience to evaluate if it's that or just someone having at it with a hack saw Can you take an image directly at the edge of the quarter? That might give insight.
I see no teeth marks from a hack saw, so that's ruled out. Personally I'm back to lacking experience seeing an actual straight clip. @bsshog40 has a point about it being ground down, but I'm not sure. I think I'll have to defer to the experts in the forum like @paddyman98 and @Mountain Man to give their opinion.
Ok, after a little more reading from: http://www.error-ref.com/blanking-and-cutting-errors/ I see that this does not have features #2 'Fade-out and taper of the design rim' (like @Heavymetal's nickel above) nor #5 'Metal flow in design elements'. Based on that I'm going to have to agree with PMD, sorry @Felicia04. Thanks for sharing this finding though, it turned into a interesting investigation.