Can't tell because your pictures are so small. Typically that's where a MD would show itself, not a 'doubLED die'
Nice cud.
I would say the 'T' in trust was struck on the rim, the other I can't see anything.
I would'nt exactly call it extreme. I've worse.
It's machine doubling, what's that on the middle 9.
Those look like bag marks (coins in a bag will get dinged from other coins)
As the die's wear you'll notice changes
Definitely a 1972.
Yes, a grease filled die.
It might be a struck through or post mint damage. Can't tell from the picture.
I read that thread and didn't notice anyone saying that your coin was not a error. I will agree with Treashunt on what he said.
I suspect a grease filled die to create what you have.
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