- Condition: The condition of the bill is the most important factor in determining its value. Uncirculated or mint state bills are worth more than circulated bills. Circulated bills with folds, tears, or stains are worth less.
- Rarity: Some 1921 US one dollar bills are rarer than others. Bills with certain serial numbers or printing errors can be worth more. For example, bills with low serial numbers (such as 1 or 10) are often worth more than bills with higher serial numbers.
- Series: There are two different series of 1921 US one dollar bills: the Federal Reserve Note and the Silver Certificate. Federal Reserve Notes are more common and thus worth less than Silver Certificates.
- Demand: The demand for 1921 US one dollar bills can also affect their value. If there is a high demand for a particular note, its value may increase.
Given these factors, the value of a 1921 US one dollar bill can range from a few dollars to several hundred dollars. If you have a 1921 US one dollar bill, you can consult a professional numismatist or coin dealer to determine its value.