It's always a debacle around here surrounding these cents. Some say roller lines, some say improperly annealed/alloy.
I will say Improper Alloy Mix. AKA Woodie. All coin metal goes through the rollers, but not all have IAM. I do believe there was an up-tic in coins like this (late 70's - pre-82) due to the mint using up all their copper resources in line with their no longer manufacturing copper blanks for the cent coins. The new Zinc coin blanks are out-sourced.
Looks to be roller lines to me. The lines seem too perfect to be a woody, IMO. I usually come across one of these in my change every so often. The next time I get one I'm planning to see if the lines are removable by cleaning it with something. Just for my own information, what part of the minting process involves rollers? Here's something I found online that helps.
The lines don't fully remove. They show lightly, as the coin tones over again they show back heavy. It happens as the ingot is rolled to planchet thickness for the blanking press.
Rolled-in patterns and textures. No description or photo of coin with lines. https://www.error-ref.com/rolling-mill-errors/
Thanks everyone for your helpful comments! I have taken a closer look and concluded that it is just roller lines.
You go ahead and throw it in a flip. A few years will pass, you will be equipped with better knowledge. You might change your mind on this variety.
