What i have here is what appears to be a DIE CLASH. That is where the dies come together to strike a coin with out a planchet (blank) inbetween. Thus the two dies strike each other and leave some of thiere impressions on the other die
As for flow lines, that is what happens when a planchet (blank) is struck by the dies. The planchet is technically a tad smaller than an actual coin of that denomination. and think of playdough or clay. Make a small ball with it. now squash it. the way that clay moves is not unlike how metal moves. Thus when a blank is struck by the dies, the metal of the planchet has to flow somewhere. And it does. Outward from the center.
