Greenstang

Simple answer, no.

The only 1970 small date has the S mint mark . Seeing yours has no mm, it would not be possible

Welcome to the forum

We see these quite often on the forum.  
As Coinbuf stated, just a vise job or sometimes called a garage job.  
 Someone with too much time on their hands. A damaged coin now.

Welcome to the forum

That is not an error, it is damage  (PMD). There is no way for that to occur when the dime was struck.

Good find. Hard to come by in the wild.

Looks like there is a bit of split plating above the letters.

Please do not use screen shots, they are too pixilated to see small detail clearly.   
From what I can make out, it looks like zinc rot, just another damaged zincoin.

That would be Die Deterioration Doubling (DDD)

In Mechanical Doubling the devices would be reduced.

Photos are a little dark to see detail but without even looking at it I could be 99.9999%  sure it is a counterfeit.  
This is probably the second most asked question on the forum and no one has found a genuine one yet.

Thanks for the new photo. The fact that the reeds are missing and the diameter is smaller confirms my thoughts that it is a dryer coin. This is not considered an error but damage to the coin.

Suggest if you are going to look for errors, read up on what constitutes an error. Sandon has given you some websites plus this is one I use frequently.  error-ref.com.

No need to apologize, everyone has to start somewhere. Suggest reading the top two posts in this column, there is a wealth of information there for beginners.

Your coins weight is in spec so its not overweight. Would still like to see a clear photo of both sides. Also would you put this quarter on top of another quarter and see if the diameter is the same or is it smaller.

First, never hold a coin in your bare hands, the oil from your skin can cause fingerprints and greatly devalue a coin.

Also those are not reed marks, it is a pattern around the edge of your coin. It looks like the edge has just been worn down either intentionaly or unintentionaly.

Almost forgot, welcome to the forum

Welcome to the forum

First we need the weight to two decimal points. Second we need a clear photo of both sides of the coin.   

Also please crop your photos, we don't need all that background and it will enlarge your photos.

It could be one of a couple of things be we need more informaytion.

Welcome to the forum

A clear photo of both sides along with an explanation of what you see is required before anyone can help you.

Quote

It could be a knockout from a metal electric box

That was my first thought but a knockout usually has a small metal tab on the edge that I do not see.

If you are including ancients, then I think Alexander the Great may have had his coins minted in
at least 8 locations as he had mints in various areas of his vast empire.

Would really need to have the size. It looks like a blank of some sort.

Looks like it might be a small delamination.   
Also a Struck Through is not a variety, it is an error. 

Not an error of any kind.An error can only occur during the striking of
the coin and that could not have happened at that time.
That looks like there is some sort of glue like substance on the surface.   
Try soaking it in pure acetone for about 24 hours and see if it disappears.

The filled D is what is known as a broken post, quite common on D and P mintmarks.   
The circle on the reverse is as Sandon stated, probably caused by a coin wrapping.  
or other type of machine. It did not happen during the striking of the coin.   
It is just a damaged quarter worth 25 cents.

Duplicate post

What is really light? Give us a weight to two decimal points.   
Looks like a zinc cent that is missing the copper.

Common machine doubling.   
Also do NOT use screen shots, they are too pixilated to see detail clearly.

If someone offered you 25 cents, take it. They are common in circulated condition.

Welcome to the forum

What you have are 3 Large Date cents worth 1 cent each.   
It is the 1982D copper Small Date that is the valuable one but you
have a better chance at winning the power ball lottery than finding one?   
There are only a couple known to exist.