Cracked dies do not affect the rim of a coin. This specimen shows the effect spreading into the rim. The new photos confirm this. For this reason, I do not think this is a cracked die. Or a pre-cud. We are seeing something else here. Is it a planchet issue? Corrosion between the zinc/copper plate? Something else? Maybe Ed @paddyman98 has a thought on this one.
Thanks for the new photos. It really looks like a cracked coin/planchet. How is unknown to us. Normally hitting such a coin with a hammer will only bend a copper-zinc coin. However, if treated in a lab with liquid nitrogen, very deep freezing, the zinc cracks rather than bend when hit with maybe a hammer. The copper more stretching and some cracking from that can still attach to the coin. IMO and guess, Jim
I don't see much offset in the design, not enough to call it a retained cud. Nice rim to rim @meandyou4ever0
A member email me the info that there are youtubes , so I found this one. When I was in college 55 years ago, we used grapes to make ammo for certain frats windows Bad US!!!
Put it into a flip, find it in a few years and use your knowledge to affirm what you wrote, That could easily be a linear plating blister.