Help with a quarter

[RedSpey]

I'm new to coins and I found this one in my change today. Any ideas? Here's what I noticed:

I noticed that the "E", "R", and "L" in LIBERTY may be doubled, but is that possible?

Also, the mint mark (P, I think) looks like it is in a divot.

Of course, the right edge is obviously off and the whole face is off-center.

Does the "9" in 1981 appear short?

Finally, is this common? I think it's rather cool, except for the condition of the coin.

RedSpey

 

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[JakePhelps]

Neat find! Could be a doubled die error, and the mintmark im not sure, i havent heard of that error before but it may be one!