I'm new to the forum but also new to coins. I've been reading up on coin errors but this one still puzzles me. I found it a few weeks ago under the carpet under my passenger seat in my car. It's a teddy roosevelt America the Beautiful Quarter
but the writing around the halo/ring of the tails side is not there. Nor are any raised features of Washington's face on the other side. Puzzled but curious. What would cause this? Also I should note that some brown coloration is present along the bottom of the tails side. Thanks!