If it's real silver, it would be worth melt. It definitely wasn't minted in 1900, and is more similar to the modern silver eagle design than anything that circulated. At first glance, I was thinking it was a silver eagle with an altered date; but the coin really rough for a silver eagle...so it may be a fake. I'm not even sure it is silver. Have you weighed it?
Regardless, it is going to be worth whatever the metal value of the material it was made of.
I will weight it as soon as I am able to. you know it seems I have no luck, so far I've got three one-dollar coins that have been anything but real. [/frustrated]