Ben Franklin
The first Federally-issued 100 bills were printed in 1862. Please check your bill again and post a new, separate question with more information that might help to ID it.
Since 1914 it has been a picture of Benjamin Franklin with Independence Hall on the reverse.
The U.S. $100 bill has a picture of Benjamin Franklin, who was an accomplished scientist, inventor, and statesman, but he was NOT president.
$5=Lincoln $10=Hamilton $20=Jackson $50=Grant $100=Franklin
Assuming it's a US $100 bill, yes, it's worth $100. Someone took a stamp pad and added the picture of the animal.
The picture on the U.S. $100 bill is of Benjamin Franklin, one of the Founding Fathers of the United States. He is depicted on the front of the bill, while the back features an image of Independence Hall. Franklin is celebrated for his contributions to American history, science, and diplomacy.
1432
The picture on the U.S. $100 bill features a portrait of Benjamin Franklin, one of the Founding Fathers of the United States. Franklin is depicted in the center of the bill, and the design also includes various security features and images related to his contributions, such as a representation of Independence Hall. The $100 bill is the highest denomination of U.S. currency currently in circulation.
Benjamin Franklin
There were no series of 1951 $100 bills ever printed.
Ben Franklin
a 1981 100 dollar bill had a picture of franklin d. roosevelt on it.