about $3
It's worth more for the silver (about $2.00) than the buying power in 1950.
It's actually called a Roosevelt dime; the last Liberty dimes were minted in 1945. There's more information at the Related Question.
A typical run-of-the-mill 1975 dime is worth $0.10. A rare specimen might be worth more, but since you didn't give us any distinguishing characteristics, we can't help you.
A Dollar
The value of a 1945 Mercury dime (often referred to as a "micro s" dime due to a small mintmark) typically ranges from $2 to $5 in circulated condition. However, if the coin is in uncirculated or high-grade condition, it can be worth significantly more, potentially exceeding $10 or more, depending on its specific grade and demand. Prices can vary based on market conditions and collector interest. Always consult a current price guide or specialist for the most accurate valuation.
The reason is because the dime used to be made of silver, while the nickel has always been a copper/nickel blend. Silver is worth more, which is why the coin could be smaller, but worth more. There used to be a silver half-dime, but the coin was so small that it was replaced by the nickel.
The value of a 1945 dime with the inscription "E Pluribus Unum" primarily depends on its condition and mint mark. In circulated condition, it typically ranges from $2 to $3, while uncirculated examples can be worth $10 or more. Collectors may pay more for coins in excellent condition or with unique features. To get an accurate valuation, it's best to consult a coin dealer or check recent auction results.
yes
Mercury dimes were minted from 1916 to 1945. Your coin is called a Liberty Seated dime. Please see the Related Question for more.
The 1969-S dime is a Proof coin, that's why it has higher value.
In general no. Just because a dime has a mintmark does not make it more valuable.
The value of a 1974 dime depends on its condition and any unique characteristics it may have. In average circulated condition, a 1974 dime is worth its face value of 10 cents. If the dime is in uncirculated condition or has mint errors, it could be worth more to coin collectors.