Hi, I just bought an american silver eagle proof on eagle. The US mint box and certificate of authenticity is included. How do I know that the seller didn't swap the coin from the US mint for an uncirculated kind, and recapsulated it. Sorry if this has been discussed before. Thanks for your advice!
The two coins are unmistakable, the proof will be very shiny in fields and frosty on raised areas, the uncirculated is pretty much a uniform frost look
It's very easy to tell a difference between a proof and unc eagle. A proof will be very shiney and have a mirror effect. Here is a unc version, it's more of a flat finish:
