Looks more like some light mechancial doubling or a hit, but I'm not an expert on quarters. Keep up the hunt!
Here are the attributes for the 2 listed on CONECA's master listings. RPM-001 = Die crack on eagle's upper Left (viewer's Right) wing Die crack BUS of PLURIBUS to wing under AME of AMERICA RPM-002 = Die crack on forehead and hair Die crack above eyebrow Die chip on nose If you can find either of these sets of attributes, you will know for sure
It's not #2, here is a link to that: http://varietyvista.com/1958DRPM002 quarter.htm. It might be #1. I'll check my RPM book when I get home.