The two sides of the Great Seal of the United States are prominently displayed on either side of the large word ONE.
Great seal of the united states
Reverse
The Great Seal of the United States and the word ONE
The Great Seal of the United States appears on the reverse side of the US 1 dollar bill. It can be found on the left side of the bill, opposite the portrait of George Washington. The Great Seal consists of an eagle and a shield with various symbols and mottos.
The design on the back of a US dollar bill that features a pyramid is the reverse of the Great Seal of the United States. It just means the people who designed the dollar bill wanted to feature the reverse of the Great Seal on it (the design in the other circle ... the Eagle ... is the obverse, or front, of the Great Seal). The official symbolism, presented at the time the US Congress approved and adopted the Great Seal, is that the pyramid "represents Strength and Duration."
The eye on the U. S. dollar bill is called The Eye of Providence and is often interpreted to mean the eye of God watching over humanity. It appears on the reverse of the Great Seal of the United States. In 1935 both sides of the Great Seal were added to the reverse side of the one dollar bill.
A one dollar bill.
The two main designs are the obverse and reverse of the Great Seal of the United States.
It's the Treasury Department seal and is a mark of authenticity because it indicates the bill is issued by the US Treasury.
The blue seal indicates your bill is a silver certificate. Please see the question "What is the value of a 1934 A US 5 dollar silver certificate?" for more information.
It's a 1966 A $100 Red Seal Elston/Kennedy bill, nothing more.
"F" is the highest series letter for 1928 $5 red-seal notes. Please check your bill again and see the question "What is the value of a 1928 US 5 dollar bill with a red seal?" for more information.