Very, very nice find! That's the big one! That die marker above the D of UNITED is visible on your coin which is a marker of authenticity too. Here's that marker on the example I own:

Super cool and Congrats! Always amazing to see one of these pop up.
-CH27

Super cool and Congrats! Always amazing to see one of these pop up.
-CH27
Collector of U.S. Coins, Varieties, and Colonial Coinage
































