Greenstang

Agree, it has been attacked with acid which eats away the copper core. Maybe someone making a small yo-yo.

Welcome Newbie First, this is the registry forum for registered sets, you should post in the Newbie Forum for best results. Also in the future, always supply a complete photo of both sides of the coin and do not use screen shots, they are too pixilated. This will better help us help you. As far as your cent goes, there is no DDR, maybe some Machine Doubling, a little hard to tell.

Ifyou are going to compare coins, you have to compare the same year. Dies and mint mark styles can change from year to year,

That is common Machine Doubling, one of the worthless types of doubling.

Could also be from an over aggressive mint worker who struck the mm punch too hard and the shoulder of the punch is showing.

Doesn’t look like any of the three known RPM’s for a1984D. Possibly a plating blister which is common but hard to tell with the reflection on the photo.

Maybe it’s just my eyes but that looks more like Machine Doubling to me.

I thought it was the foot of a sock. In either case, unecessary when all you have to do is put it on a flat surface..

It is a counterfeit. It is showing a 1879 reverse. Where did you get it ? Also do NOT hold coins in your hand like that. If it was genuine you could get oil from your skin on it which could cause marks.

If you are going to take pictures on your foot (why I can’t comprehend), at least crop them, we don’t need all that background.

If it is the same coin, then the answer is the same. Common and caused by overpolishing of the die. With a faint line connecting the roof, it wouldn’t even be considered a “floating roof.”

Welcome to the Chat Board What anomoly are you seeing, can’t really see a planchet error. If you are talking about the colour, then it is probably gold plated. Where online do you see one going for $10,000. Please supply a link so we can form an opinion.

Welcome to the Chat Board. This is the forum for buying/ selling coins. You should really have posted in the Newbie or Ancient Coins forums, I have asked a moderator to move it. That is a 18 Groschen from the State of Brandenburg. That is Frederic III who ruled from 1688-1701. It is probably worth $25.00-30.00.

The numbers #61 & #86 are probably a dealers stock number DDR means Doubled Die Reverse, a variety. See doubleddie.com or varietyvista to see which variety yours is. Struck Through is an error caused by something on the die ( grease, grit, cloth etc.). that makes an impression on the planchet when it is struck.

If it is worth more than 1 cent, it’s not by much. Just one of over 887 million minted that year beside the fact that it shows damage. In the future always show both sides of the coin and crop your pictures.