That's an amazing coin. You don't see them posted often, and certainly never in that condition. I've found a couple but barely even able to ID them. Congrats! I'm thinking that is your new avatar!
No plows or fertilizer had ever hit this yard so the 20 or so various coppers I've dug there tend to be in better shape, but this one stands out even so. Most of the time around here they're pretty toasty, too!