Here's a whole new batch of weird stuff on hundred dollar bills. Someone told me that these markings are actually called "chop" marks and that they are used by foreign countries to keep track of non-counterfeit bills, but I think there's more to these unusual works of art. There's a conspiracy in here somewhere.

LETTERS


A red letter B in a circle.



Two letter B's in a blue circle.



A purple letter P.



Blue letters SPN along with a purple symbol of what looks like a diamond.


NUMBERS


The number 28698.


SYMBOLS


Blue Arabic writing in a circle.



All kinds of marks: Arabic symbol, a sun with writing inside it, random numbers, and initials RIB.



A money symbol on money, kind of redundant.