The blue strip to the right of Ben is kind of odd... as the light shines on it, it changes back and forth from “100” to some kind of strange symbol that looks like a T on top of an upside down U... not sure if that is just a result of the process, or if there is some meaning to that symbol.
Explained here.
http://www.newmoney.gov/uscurrency/redesigned100.htm
Haven’t seen one so I can’t offer an opinion on what it looks like.
“not sure if that is just a result of the process, or if there is some meaning to that symbol”
Freemasons?
That's the liberty bell, which is cracked and won't ring.