All three are George Snell broadheads, George was a bowyer and arrow maker as well as a few broadheads,
he was one of the early pioneers in the St. Paul MN.area.
There is a great article on him in Instinctive Archer magazine ( man I miss that mag.)
Fall 1997 called " In my grandfathers day " by Hank Curtis. ( see Robs dvd)
The funny part and the gist of this post was that I have had this for a long time and never noticed that there was a pin in the one on the right.
If you really look at the one on the left you will see that the ferrule of that one is brass, I have never seen a Snell broadhead of brass other than this one.