First off, my name is Emmanuel and this is my first post, hello everyone! I was given this knife and I think it's cool because it is a switch blade, but there has to be some history to it. I searched and found similar knifes with presto brand and saw they are pretty desirable but never saw a pic of this one. It only has 1 blade, it pulls out strong. I believe the handle is made of bone? It is 9 inches long with the blade out. Any more info would be nice. How much do these usually sale for? It has normal wear and tear. Here is the pic. Thanks in advance!