Here are some factors that can affect the value of a 1965 quarter:
1. Condition: The overall condition of the coin plays a significant role in determining its value. A coin in mint state (MS) or uncirculated condition will be worth more than a worn or damaged coin.
2. Mint Mark: The mint mark indicates where the coin was minted. 1965 quarters were minted at three different facilities: Philadelphia (no mint mark), Denver (D), and San Francisco (S). Coins with a rare mint mark, such as the D or S, may have a higher value.
3. Errors and Varieties: Errors or unusual variations in the design or minting process can add significant value to a coin. For example, certain die errors, double strikes, or other anomalies can make a 1965 quarter more valuable to collectors.
4. Numismatic Value: Some 1965 quarters may have numismatic value due to their historical or cultural significance. For instance, a proof 1965 quarter, which was specially minted for collectors and has a mirror-like finish, can command a higher premium.
It is important to note that the value of coins can change over time based on market conditions, demand, and the specific characteristics of the coin. If you have a 1965 quarter and are interested in its precise value, it is recommended to consult with a professional numismatist or coin dealer who can provide an accurate appraisal based on the specific details of your coin.