What is this

I have these old blue coin books that were my dads. We have never removed the coins until today. He started collecting as a child in 1949. Today I removed them to familiarize myself with the reverse side. However one coin has this. At first I thought PMD but looking closely the darker area is all raised metal so what is this? Has anyone seen anything similar?

 

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It looks like old dry glue. Welcome to CT.

 

It’s not I dipped in distilled water and wiped with a lint free cloth. It’s part of the coin.

 

i was gonna say its maybe a cud but usually you cant see the text? am i correct?

 

It could be a bubble though

 

Glue might not respond to a dip in distilled water, and it is not a good practice to wipe any coin (although from the look of that one, no matter). I would give it at least an overnight soak in water and then see what probing with a toothpick might do. Next would be to try xylene, or acetone.

 

No idea on bubbles? Would that be on both sides of the reverse side?

 

They are my dads childhood collection. I know all are likely more of value in sentimental reasons than cash value. I don’t want to damage them but I want to preserve them as best as possible

 

They are my dads childhood collection. I know all are likely more of value in sentimental reasons than cash value. I don’t want to damage them but I want to preserve them as best as possible

 

a bubble would be on one side,i have a bubble on a 1979 d lincoln penny but it doesnt have much on the bubble because its on his head.....yours though could be a bubble but its nothing special but if the bubble pops during the process zinc will leak out. You said its raised correct?

 

but there can be multiples and if it isnt a bubble then it probably is going to be glue

 

Yes raised and def not glue. It’s part of the coin

 

And they are all special to me for sentimental reasons so value or not doesn’t really matter but I am enjoying the learning process

 

Not a Cud. A Cud is formed when part of the Die breaks off. When it strikes the Blank Planchet nothing will be transferred to it.

Bubble? No. That is not a Copper plated zinc cent.

 

Dude you have much to learn..
Cents minted before 1982 were Copper Planchets. They are not Copper Plated Zinc Planchets. The coin in question is a Wheat Cent made of Copper.
Your bubble explanation only occurs on Copper Plated Zinc cents minted from mid 1982 and afterwards. You are reffering to zinc rot.

- Mr. Ed
Specializing in collecting Mint Errors since 1985

 

Start a separate thread with pictures.. I would be interested in seeing what this "bubble" you're talking about is

 

I'm thinking some kind of PMD - Post Mint Damage.
Not any kind of error that I know of.
Can you also show the Obverse side of your coin.

 

From the pics, it looks like some type of residue, like glue or resin. There is also a lot of wear and damage on the rest of the coin, so it circulated for a while.

I agree with @paddyman98 there isn't anything in the minting process that would Cause a feature like yours.

@Zayne Eldridge
Please make sure you know and understand the information before posting an answer. It's easy for experienced collectors to see that your response doesn't make any sense, but new collectors may become confused. I feel that it's very important to give new collectors accurate information so they can learn and grow in the hobby. Posting inaccurate info doesn't help

Here is a link that explains occluded gas bubbles. You may also want to read up on lamination errors as they are closely related. Remember, these defects occur during the ingot casting process, before it's rolled into a strip, so they are usually elongated. Bubbles in copper plated cents are plating defects. Also, zinc will not "leak out" of a copper plated cent during the minting process. Temperatures don't come close to reaching the melting point of zinc

http://www.error-ref.com/?s=Gas+bubble

The error-ref site is a good place to learn about the different types of errors and how the occur. Also look at the following to learn the minting process.

https://www.usmint.gov/news/inside-the-mint/how-coins-are-made-coin-production-terminology

 

From your pics, it's evident that you have a pre-clad cent (a wheatie). We can rule out clad issues. But, cents at that time were not 100% copper. They were generally alloyed with tin & zinc. It's possible you have a lamination issue (or even shattered die related) shown on the reverse of that coin. I searched as best I could and that is all I could come up with for you. Check out this site and see if any pics they have come to a close match to your coin's issue.
http://www.error-ref.com/
Welcome to the group.

 

Wrong
There is no cladding in Copper Cents. They never were cladded. Even the newer type cents are not clad they are plated. There is a huge difference!

Incorrect. That also has nothing to do with a shattered die or any kind of die break.