2000 D Penny. Die Polish Lines Or Chip?

Looks like trapped gas making a linear trail gas bubble,a plating issue.
John1

I have few pretty much just like this, and the lines are hard, I cannot flatten them at all. I just assumed it's some odd die clash/plating issues?

yep, Makecents nailed it - these are roller lines.

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.