Greenstang

No it could not, it is damage, plain and simple.

It may be from an improperly mixed gold alloy.  
Gold has a small percentage of copper in it and sometimes it shows through the gold if not properly mixed.

Also agree, it is not even close to being genuine.

Those are a commemorative issue that were released in 1987 to celebrate the All China National Games
and had a mintage of over 11 1/2 million each.
Like the Olympics, they are held every four years. In 1987 they were held in Guangdong Province.  
They are made of brass and probably have a value of about  $8-12.00 each, depending on the subject.  
As far as I know, those are the only 3 varieties issued.
 
Almost forgot, welcome to the forum.

Welcome to the Forum
I don’t se a DDO but I do see a linear plating bubble.  
What are you considering DDO?

Agree with others, just a damaged D mint mark.
 

If it was struck again, it would show on the whole coin, not just the mint mark.  
It is just some sort of stain or mark, nothing significant.

Welcome to the Forum.
Sorry to burst your bubble but that is not a DOUBLED DIE (Note proper terminology).    
That is what is known as worthless Machine Doubling.
 

Agree with Just Bob
It has been attacked by acid and copper being softer than nickel, the copper core   
eats away faster.  Have seen quite a few of these.

The backside is called the Reverse for correct terminology. 
If the coin is warped, then that is just more damage.  
That cent has had a rough life in it’s short existence.

Welcome to the Forum.
Sorry to burst your bubble but that is not a DOUBLED DIE (Note proper terminology).    
That is what is known as worthless Machine Doubling.
 

Welcome to the Forum.
Sorry to burst your bubble but that is not a DOUBLED DIE (Note proper terminology).    
That is what is known as worthless Machine Doubling.
 

Welcome to the Forum
There is a big difference between damage and wear to a coin and an actual error.  
Suggest you study a bit to tell the difference. This way you can save time by knowing what to look for.
error-ref.com is a good site to see what actual errors are.
Variety Vista is a good site to study up on varieties.

Missing copper and larger diameter= Texas Cent
It is considered damage and has no Numismatic value but keep as a novelty if you like.

You can tell at a glance that is a Large Date. Easiest way to tell is just look at the distance between the 2 and the rim,   
if you can fit another number in the distance, it is a Small Date, if it is close to the rim, it is a Large Date.

You can tell at a glance that is a Large Date. Easiest way to tell is just look at the distance between the 2 and the rim,   
if you can fit another number in the distance, it is a Small Date, if it is close to the rim, it is a Large Date.

Welcome to the forum
Damage is not an error. Value 25 cents.

As stated earlier, it is just damage from a hit.

Welcome to the CCF
First of all, most errors are one of a kind so every one would be newly discovered.   
As noted above, it is best to assume anomolies are damage first (over 90% of them are) and then see if it can be an error.  You have to remember that an error  can only happen during the striking of the coin while in the coining chamber, anything that happens after that is damage. It is best to learn how coins are minted, there are numerous sites on line, and then study what an actual error looks like. A good site for this is error-ref.com  to see what an actual error looks like. The more studying you do, the more you will be able to eliminate damage from an an actual error. Do not be afraid to post questions though, if you have another coin you think is an error, post a clear photo of both sides and tell us what you think the error is, this way we will be able to tell you if you are right or wrong.
 
 

Welcome to the CCF
First of all, most errors are one of a kind so every one would be newly discovered.   
As noted above, it is best to assume anomolies are damage first (over 90% of them are) and then see if it can be an error.  You have to remember that an error  can only happen during the striking of the coin while in the coining chamber, anything that happens after that is damage. It is best to learn how coins are minted, there are numerous sites on line, and then study what an actual error looks like. A good site for this is error-ref.com  to see what an actual error looks like. The more studying you do, the more you will be able to eliminate damage from an an actual error. Do not be afraid to post questions though, if you have another coin you think is an error, post a clear photo of both sides and tell us what you think the error is, this way we will be able to tell you if you are right or wrong.
 
 

Welcome to the Forum
Pictures are a little out of focus but if it is a dent, it is either PMD or a Struck Through.  
A clear closeup of that area might help in determining the cause.

As there is no value to that aftermarket case, I can't see any harm in taking the Morgan out and putting it in an airtite. It would certainly be much smaller for storing and would eliminate any chance of misrepresenting it.
 

Speculation doesn’t really matter know as the OP has already sent the dime out for verification.  
All we can do know is wait for the results. Hope things turn out well.

The pictures are clear enough.  
As I stated earlier, something, possibly solder, has been put on the reverse.   
Maybe it is part of a clasp to make jewellery.
Doesn’t really matter though, it is damage to the dime as it wasn’t on there  
when the coin was struck.

Sorry but that is a 1942. A 1943 has a different shaped upper half.