Same for the Indian cent. Flow lines. Totally natural. Kind of neat, actually. I like the "sun rays" metaphor. Wouldn't have thought about describing that way, but it's a fairly apt description.
He didn't say flow lines. He said die wear. Flow lines would emanate out like a droplet in a puddle of water.......
Yes, this pattern is from die wear. It is common, and occurs on any die which was used past where it should have been.
Thank you. I knew worn out and overused dies could show as cracks (1866 1c), grain (1960 5c), and mushy lettering (1964 25c). Now that I know about this I can stop thinking some sad coin doctor spent a day whizzing a common date Indian Cent with a dental tool to pull it up to 63 RB.