I'll try to help you out.
There are two different varieties of this coin issued for circulation as well as six different pattern strikes.
And unfortunately this particular coin is highly counterfeited.
Upon my first glance, I would say that the middle coin is definitely silver and has sharper characteristics more indicative of a genuine coin. The other two, not so much.
First off, if you could post some clear close up pics of their obverse and reverse that clearly show the crucial symbols needed for proper authentication and identification, as well as a clear image of a section of their edge (rim) while sandwiched together, these would be very helpful.(and neccesary)
Second, if you could post the weight (in grams) and diameter (in mm) of each coin.
Third, check each of them to see if they are magnetic or non-magnetic.
And can you tell me if there is a dot visible following the word "Dollar" on the reverse of each coin?
Just post the additional info as you get it when you can, you don't have to wait until you have gathered it all to post it all together.