Greenstang

Nice find. I have heard of this but never seen one before. Send it of to a TPG so it is certified and protected.

Another fantasy coin from Ratsie33

Could be from a vending machine, coin wrapping/counting machine etc. but it was not done during the striking of the coin.      It is just some form of machine damage.

It is just PMD. Something has struck that side of the nickel causing damage from the " banana peel" down to the A in America.

Here again, no doubling or RPM

You have more patience than I have. I would have opened it the day I got it. Also I bet you will find a lot of MD on the incuse copy on the reverse. I read on another forum that about 70% of State Quarters have some MD in that area. 

Karen
That article refers to a Dropped Letter which shows up incuse on a coin, a MPD shows as raised on a coin, which is what the IH shows.

I respect your numismatic knowledge VKurtB,  but in this case I believe this is a genuine 1 in Neck Snow-1 Variety.  It is only the tip of the 1 that shows, the bottom "serif" is a bead on the necklace so you can't compare length as there is nothing to compare it to. Also a Snow-1 Variety is recognised by PCGS who have stated the following on their website,
I have also posted the following comparison picture showing the OP coin and a Genuine1 in Neck. Except for the amount of wear, they look the same to me..

I think the key word in your post is "potentially".  Why was it not sent out to be certified or recorded somewhere? I have seen numerous posts where someone thought they had found a 1993 WAM only to find out it is a CAM that was either damaged or struck from a worn die. Unless someone can produce a certified 1993 WAM, I would have to say that they are non existent.

Dustin-
In order to help you with the WAM, CAM varieties, I am posting the following illustration. It has been posted many times on various forums so I'm not quit sure who to attribute it to. Notice that the only years with a variety are 1992,1998, 1999 & 2000, any other year the AM is normal.

Looks like a well corroded cent.

Looks like Environmental Damage.  Maybe it was buried at one time.

Welcome to the Forum
First of all, coins are not printed, they are minted or struck. Your right on your coin, it is just damage, value 25 cents.
If your referring to a " misprint" as an error, then you have to learn the minting process and what constitutes an error. An error can only occur during the striking of a coin so anything that happens after that is just damage. There are a limited number of things that can happen during the striking of a coin but there are countless things that can happen once the coin leaves the striking chamber. Things like dings, gouges, scratches,  distorted letters, wear, flattened letters, discolouration etc. are just some of the things that can most of the time be defined as damage. For help in what a genuine error is, study some of the websites available such as "error-ref.com"  to learn in distinguishing an error from damage. You are going to have to do your homework but after awhile it will come naturally and you will be able to see the differences for yourself.

Much better. Confirms my original assessment of DDD.

Sorry but I don't think so.
Also Die Doubling is a Variety, not an Error.

Yes

Always show both sides of coin when you have a question and state what you would like to know about them.
Also rotate your coins properly so I don't t get a kink in my neck trying to see them right side up.

Nice BIE.
Can't really tell what is going on with date and mm. Need a close-up without the  "white light" reflection.

InWelcome to the Forum.
In the future, it would help us if the photos were cropped and oriented properly.
To answer part of your question, the first coin is a UK 1908 Half Crown and is made of sterling silver. The second is a US buffalo nickel, can't make out the date. The third is European, maybe German.

This will be my last reply to this post.
If you understood the minting process, then you would know that what you are saying is impossible. The dates are not hand punched and are permanently engraved into the die so added numbers or letters just can't happen. What you have is a regular Large Date 1982 cent and nothing more. Please believe what everyone is trying to tell you and don't try to create something that isn't there.

Not DDO, it's DDD (Die Deterioration Doubling)
In the future, please rotate your pictures properly. It does make it easier for us to determine what is going on with your coin.

The red trim indicates they were made at the Denver Mint
The light blue (earlier years) and the dark blue (later years) indicate they were made at the Philadelphia Mint

Those two graders you mentioned are both regarded as basement slabbers so anything they grade are probably inaccurate.
It is hard to say without seeing photos. You do not even say what year the coins are. More info will be required as it will depend on the coins. Some may be worth regrading, others may not. 

Thanks Matt_dac, another name for my "Do not respond" list.

The first coin is a Die Chip
The second looks like a Die Chip also
Three and four are MD