The color doesn't look right to me. Are you suggesting that they are toned, or does your white balance need adjusting? I had several of the 1999 SBA Proofs, and they were "blast white". Chris
I believe you may have something. Get a sac dollar and compare the color and put the coin in a flip and don't touch the thing! There were a few sba dollars struck on brass intended for sac dollars. This may be one.
The other option is its a gold plated coin from one of those shister promotions. I do believe you did say you got it from the mint though.... Not a proof though, no wire rim. Compare the rims of the graded coin to your coin.
I did get it from the mint when they first came out. It is a proof as stated on the ANACS slab. The coin in the second post is the regular strike non proof