ok heres another riddle:
An Archeaologist finds a coin with the inscription "King Henry I" on it.
It also is dated back to that era.
He was overjoyed with his find which he assumed was worth millions.
He showed it to another one of his archeaologist friends who also agreed to it being a rare find.
Walking down the street they passed by an elderly man who they showed the coin in their happiness,
Upon viewing the coin the man immediately said "it's a fake!"
How could the man tell?
good luck!