2000 D Penny. Die Polish Lines Or Chip?

Thanks all. I read about the roller lines on the subject with woodys. I suspected plating issues and tried to push down the area with a tooth pick no movement. But makes sense if it was there before being struck! I appreciate all the feed back.

You think these are also "rolling lines"?

There is nothing on reverse. And the first photo I posted - n9t all of the coins have those lines on the both sides, I definitely have seen (maybe even still have some around) pennies with those lines only on O or R.

I agree with -makecents-.

Alright then, John1, I was kind of right. I reached out to Will Brooks and he sent me some pics of his write up of this in CONECA's Errorscope (July/August of 2020). They are channels that are already in the stock and therefore on the planchets before ever plated and struck, sometimes exacerbated by grease. Here is the writeup on it, hope it can be read, kind of small. I remembered this but just slightly out of context. Nice pics from Ray Parkhust,(mpsrpms) on here. Pics from Vivien Bullard and much input on this study, (a super sharp friend from a different site). Much input towards the study from Cliff Reuter, also a very sharp individual, (Petespockets55) on here and even a pic from me, that I had forgotten about. And of course, our very own Mike Diamond. Good artical, worth the read.

After Will sent me the article, I remembered the study but had to read it a couple of times to fully understand it. It is my understanding that the grease stands in these furrows, like water in a tilled field. This will give the strike enough resistance to not fully obliterate the striations, especially in the weaker struck areas of a coin. That's my take on it and the simplest way I know to explain it, as I am pretty simple.

It was good for me to brush up on it and make it right, as I was a little off. I appreciate you asking, good for us all or at least those who are interested.

Very cool! I'm glad you got something out of it.