New dollar and old dollar
You're referring to the difference between the new $100 bill and the old $100 bill!
The United States Federal Reserve introduced a new $100 bill in 2013, featuring advanced security features to prevent counterfeiting. Here are some key differences between the old and new bills:
Old $100 Bill (Series 1996-2006)
- Features a portrait of Benjamin Franklin on the obverse (front side)
- Has a green seal and serial number
- Has a watermark of Franklin's portrait
- Has a Security Thread (a thin strip of paper with a repeating pattern of 100s)
- Has a Color-Shifting 100 in the lower right corner
New $100 Bill (Series 2013-2021)
- Features a portrait of Benjamin Franklin on the obverse (front side)
- Has a blue seal and serial number
- Has a 3D Security Ribbon (a woven strip with images of Franklin's face and the Liberty Bell)
- Has a Bell in the Inkwell (a color-shifting image of the Liberty Bell that appears to move as you tilt the bill)
- Has a Color-Shifting 100 in the lower right corner (similar to the old bill)
- Has a Raised Printing (raised images of Franklin's face and the Liberty Bell)
The new $100 bill is designed to be more difficult to counterfeit and features advanced security features to prevent fraud. The old $100 bill is no longer printed or circulated, and it's being gradually phased out of circulation.