Came across a 1776-1976 Half Dollar Bicentennial. NO mint mark. Im not sure what kind of metal it is. The edge looks silver(see pic.) But the reverse is so shiny and has some type of metal bars on it. They are not attached though. And the obverse looks grainy. I did a magnet test and it didn't attach. So its hard for me to tell. Ive had some reviews of the coin already, but want to know a little more about it.
Anyway, hope someone can help. Three pics included. (Thanks for the re-sizes BioProfessor!)

Anyway, hope someone can help. Three pics included. (Thanks for the re-sizes BioProfessor!)
Obverse:
Reverse:
Edge:
Thanks
Reverse:
Edge:








