This is the legend, whether it is true or the result of a misprinting or the human mind has to be your decision.

In 1954, following the death of George VI, currency bearing the likeness of his daughter, Queen Elizabeth, were printed up.  In Canada, as the story goes, the money there was designed by a French Canadian artist (or a member of the IRA) who hated the royal family and so he put something a little extra into the bill.  Take a closer look.

Do you see the face of the devil himself in Queen Elizabeth's hair?

Some say coincidence, some say sabotage... but the "Devil's Head" series was altered a mere two years later to eliminated Lucifer from the royal portrait.  Today, these notes are collector's items.