See the Evolution of $1 Bill Over the Past 150 Years
You probably don’t give much thought to what a $1 bill looks like, which is understandable.
But since 1862, the lowly note has undergone some crazy transformations,but it still remains the oldest design of any bill produced today.
That’s because, while other denominations of bills need to be updated to thwart counterfeiters, no one’s bothering to copy the $1 bill, which means it can maintain an older design than the other bills.
Read more: http://twentytwowords.com/see-the-evolution-of-1-bill-over-the-past-150-years/