Before 1965 in most cases. While error coins can be found on any coin from the earliest coins to the present, all other coins that are valuable were minted before 1965. Any dime, quarter, or half-dollar minted before 1965 was minted in 90% silver making it worth more than face based on that only, no matter how common the year was.
There are a few explanations (if this truly is a mint error) The first and most valuable would be a quarter struck on a nickel blank, such a coin would be worth quite a bit of money. The second most valuable would be a coin that was a clipped planchet (blank) such a coin has a cut on it, but as this can be done after minting so it is best to see a coin dealer about this. But, it is always possible this wasn't done at the mint, but was done afterwards. So you need to see a reputable coin dealer to get it evaluated in person.
No they are not, in general just because a coin has a mintmark does not make it more valuable.
For an accurate assessment the coin needs to be seen by a coin dealer, some errors can be very valuable
No, it's a novelty coin, manufactured specifically for people who want to know what the results will be when they flip a coin.
The US 10 cent coin has president Roosevelt.
Penny
nope.
Old to Gold Dirty OLD coin Old Gold The difference is G.
The most valuable US coin is the 1933 Saint-Gaudens Gold Double Eagle. In 2002 an example of this coin was sold at auction for 7.5 million dollars. At the time it was the most ever paid for any coin in the world.
August 1, 2009 There can be no doubt the most valuable US coin is the 1933 Saint-Gaudens Double Eagle. In recent years an example of this coin sold for over 7 million dollars.
No coins in 1949 are rare, but as with all US coins, high grade Mint State examples can be valuable.
After the abolition of the Guilder, the new most valuable coin would be the 2 Euro coin
Put a picture of the coin!
Ram darbar coin
There is no doubt that the 1933 Saint-Gaudens Double Eagle is the most valuable US coin. One of these coins recently sold at auction for over 7 million dollars.
The most valuable is a error coin, the 1982 dime with no P mint mark. It has a value of $110.00
Usually. A coin in Proof condition is almost always more valuable than the same coin in Uncirculated condition, but exceptions do exist.