Here are some factors that can affect the value of a 1974 D Dime:
* Condition: The condition of the coin is the most important factor in determining its value. Coins that are in uncirculated condition, meaning that they have never been in circulation and show no signs of wear, are worth more than coins that have been circulated.
* Errors and Varieties: 1974 D Dimes with errors or varieties can be worth significantly more than regular coins. Some common errors include die cracks, off-center strikes, and double strikes.
* Rarity: 1974 D Dimes are not particularly rare, but some varieties are more scarce than others. For example, the 1974-D Dime with a doubled die obverse is a rare variety that can sell for over $100.
If you have a 1974 D Dime, it is a good idea to have it appraised by a professional coin dealer to determine its exact value.