* Mint mark: The mint mark indicates where the coin was minted. In 1912, half dollars were minted at the Philadelphia, Denver, and San Francisco mints. Coins from the San Francisco mint are generally more valuable than those from the other two mints.
* Condition: The condition of the coin is also important. Coins that are well-preserved and free of damage are more valuable than those that are worn or damaged.
* Variety: There are several different varieties of the 1912 half dollar, each with its own value. Some of the more valuable varieties include the matte proof and the prooflike coin.
In general, a 1912 half dollar in good condition is worth between $10 and $20. However, coins in better condition or of a rarer variety can be worth significantly more. For example, a 1912-S half dollar in mint state condition can be worth up to $1,000.