1. Condition: The condition of the bill is crucial in determining its value. Factors such as tears, folds, creases, stains, and overall wear and tear can significantly impact its worth. A well-preserved bill in uncirculated or near-uncirculated condition will generally be more valuable than a heavily circulated one.
2. Rarity: The rarity of a particular series or type of bill can also influence its value. The 1933 $5 bill with a blue seal is relatively common compared to other rare US currency from that era. However, certain variations or unique characteristics, such as low serial numbers or distinctive markings, can make a specific bill more valuable to collectors.
3. Serial Number: The serial number on the bill can also affect its value. Low serial numbers, such as those beginning with "1" or "0000," are often more sought after by collectors and can command a higher premium.
4. Demand and Market Conditions: The value of a 1933 US $5 bill with a blue seal is influenced by market conditions and the overall demand for vintage currency. Fluctuations in the numismatic market can impact the prices of rare bills.
5. Authentication: It's important to ensure the authenticity of the bill, as there are many counterfeit and replica banknotes in circulation. A reputable numismatic expert or a professional coin grading service can authenticate the bill and provide a certificate of authenticity, which can enhance its value.
Given the factors mentioned above, the value of a 1933 US $5 bill with a blue seal can range from a few hundred dollars for a circulated bill in average condition to several thousand dollars or even more for a pristine, uncirculated note with desirable features. It's recommended to consult with a professional numismatist or currency expert to get an accurate appraisal of the bill's value.