Wow.
I will wait for coin guys to weigh in on this...
Ron Guth: 1776 was a momentous year for the thirteen American Colonies. On July 4 of that year, delegates to the Continental Congress signed a Declaration of Independence, sending notice to England and the rest of the world that the Colonies would submit no longer to outside governance and interference. In recognition of the solidarity of the Colonies and their assumption of the right as a sovereign entity to coin their own monies, plans were made to issue a Silver Dollar. Patterns, using designs provided by Benjamin Franklin, were struck in Pewter, Brass, and Silver.
The denticles below the date on some of the "CURRENCY" varieties (and perhaps others) show a curious "shearing" effect where they are only partially attached to the coin (for example, see Superior Galleries 5/2001:1009). Sometimes the loose segments will actually shift out of position, creating the impression that a drunken engraver created the die.

If this is a real coin...
Heh...
worn: $7,000 US dollars catalog value
average circulated: $21,000
well preserved: $50,000 and more
And an absolute banner.
I will prolly even still vote a banner even if it a fake just for the simple fact it looks so good :P
P.S>
DO NOT CLEAN THIS COIN.
Do not handle it unprotected.
May have to take a drive in person to a dealer of serious reputation on this.
Don't send... And if you have to... insure.
I would contact the larger dealers who have sold this type of coin.
IF... I REAPEAT... " IF "....
This coin is good...
Sky is the limit on this at auction IMO...
Those prices above reflect only PAST sales.
NOT what that coin could bring today...
Which I would be POSITIVE when I say that this could FAR EXCEED those values.