I know this is not a “woody”. I find the cracking interesting. Yes maybe some environmental damage in it after the fact I feel anyway.
I would describe your coin as having woodgrain toning. This is due to it being an Improper Alloy Mix. IAM's and Delamination can and are commonly found together on the same coin as the are related to each other as both are planchet defects. There are different types of "Woody" IAM's. Your coin does appear to have a lamination crack on the reverse. This type of error coins had an uptick in the late '70 to pre '82. I believe the mint was cleaning house and using up any stockpiles of copper in preparation for the new outsourcing of cent planchets. https://www.error-ref.com/improper-alloy-mix/
Since this is my thread can I post a dime here that I thought I had it figured out… lamination? I do have it on a thread already. 2006 dime.
Roller marks, not an improperly mixed alloy. Not unusual on late 70s early 80s cents. Read this thread. https://www.cointalk.com/threads/1980-lincoln-cent.401298/#post-10777753
I didn’t say what this was but it’s not a lamination and it’s not a woodie caused by improper mixing. @Oldhoopster is correct, it’s roller marks and nice ones at that. I’d keep it.
Maybe I have two threads mixed up? I can get behind the roller marks Or striations in the planchet. Roller marks tend to leave an uneven surface, noticable under heavy magnification. As for the crack, if it's not a lamination crack then what is it?
FYI. www.error-ref.com has good info on improperly mixed alloys as well as roller marks. I recommend going there and searching those terms if you want a better Explanation of what I was trying to say. They do a much better job.
I missed that black line as it looked more like a stain to me. Hard for me to tell but that could be a lamination crack after looking again.
