You are right about that. This is the 3rd one I’ve come across in the past 8 years or so of occasional roll searches.
I find a lot of those. I’ve been studying up on those and I think some are misaligned dies while others are the result of minor tilted partial collars.
Please expand on this. I think you might have something valuable to teach me here as I’m fairly new to focusing on errors.
Honestly, I will have to read up on the subject a little, Anvil dies are set and the collar rises from the perimeter of the die upon strike. So most of the errors found are related to a collar and the hammer die. Here is some info from Error Ref. https://www.error-ref.com/?s=Hammer+die If you don't have this site bookmarked, do it. It is an error collectors best friend.