American Silver Eagle By Who?

You have a bullion Silver Eagle, they are commonly referred to as uncirculated but that describes another Silver Eagle product sold by the Mint. The bullion versions(without mintmark) are only sold through a dealer network, you cannot purchase them directly from the Mint unlike the Proof and Uncirculated(burnished) versions. Both of those have the W mint mark. The bullion Eagles do not have a mint mark and they were minted in Philadelphia from 1986-1999 and West Point from 2000-present.

Close, from 1986 through 1999 the were struck at whichever mint had surplus capacity. So there is no way to really know what mint it came from.