And I will allow the edit/delete mesages for a period of time (24 hours) after posting it. Thank you for your comments!

Thanks for that. I hate making a typo and then not being able to correct it.

Looking forward to your picture but the correct terminology is Doubled Die which is completely
different from Double Struck.

These were a non-circulating business strike that you bought in special wrapped rolls of 25 from the mint so the value would not be as high as a circulating business strike. I'm sure if you had a roll and checked it, you would find most to be MS65 and up so the odds of finding a MS67 or MS68 would b...

No extra value. It is just caused by the Die wearing out.

That's just damage. Looks like someone tried to cut it.
Remember, it is only an error if it happens when the coin is being struck, anything after that is just damage.

I agree the mules are worth more, when I said the value of each individual coin, I didn't,t mean the face value.
The quarters might be worth more than face if any of them grade high MS.

If they are the ones I'm thinking off, those are aftermarket sets and as you can interchange the coins, I would have to say they wouldn't be worth much more that the value of each individual coin.

Correct, any prefix ending with a X is a replacement. There is also the two different styles of a Theissen- Crow BBX replacement note you didn't mention.

In the 1986 series, identification of a replacement note was made by the use of an "X" as the third prefix letter
so BRX would be a replacement note.

FYI-
There were 3,440,000 printed of that particular prefix

The average selling price for a 1913 $10.00 MS63 on eBay is $1508.00 so around there should be fair.

Looks like a plating bubble. The inner core is brass plate aluminum bronze and sometimes gas (air) gets trapped and expands forming a bubble. You should be
able to depress it with a toothpick.

Without pictures it is hard to say. Don't know of any errors on that coin.

Must have the same person proofreading that is in charge of quality control.

Your right guys, don't know what I was looking at. It is only the beaver that has a high relief.
In that case certainly not getting graded or looked at.

Your right guys, don't know what I was looking at, it is only the beaver that has has high relief.
In that case certainly not worth getting graded or appraised.