Definitely need some clearer photos, can't really see anything in those.
As stated, your coin now has damage from the eraser, it may not be readily visible to you but damaged none the less. Once your coins are cleaned...
Could you point out where you see the doubling?
I see no indication that it is silver, and if the copper core is visible then it can't be. Minor weight variations are perfectly normal.
I just see a normal, beat up circulated cent.
That is from the zinc deteriorating underneath the copper plating. Very commonly seen, but that is a big one!
Yup, fourth one down is the best one.
Copper can tone or corrode many different colors depending on it's environment.
Yes, it is glue. They show up here quite often.
It's a large date.
What does the reverse look like?
Separate names with a comma.
