You have a novelty item called a magician's coin. It's not real.
There are no 3 headed quarters minted by the U.S. Mint.
A two headed quarter is not something that was done at the mint, it is a novelty item, generally with high enough magnification you can see the seam that the two coins were joined together. They aren't rare and really aren't worth any more than a quarter.
Look at the date again. NO Washington quarter should have a date before 1932. Double headed and double tailed coins are called magician's coins and are made by machining and joining parts from two real quarters. They have no numismatic value but are sold by novelty shops for $5 - $10 and are available on eBay for $2 - $3.
Not a US Mint product. Two quarters have been glued together and it has no collectible value.
It's not a real coin and it's not from 1797. Two-headed (or tailed) coins are called "magician's coins". They're made by cutting two genuine coins in half using jeweler's tools and then swapping the sides. It's considered to be an altered or damaged item with no numismatic value. However no US quarters were minted in 1797 and no modern State Quarters carry that date either, so it's probably not even made from a genuine US coin.
There are no 3 headed quarters minted by the U.S. Mint.
A two headed quarter is not something that was done at the mint, it is a novelty item, generally with high enough magnification you can see the seam that the two coins were joined together. They aren't rare and really aren't worth any more than a quarter.
The biceps would be an example of a two-headed muscle. Another example would be the sternocleidomastoid, which is a two-headed muscle located in the neck.
Double headed novelty and Magician's coins have no numismatic value, but depending on the denomination an quality most are under $10.00
Look at the date again. NO Washington quarter should have a date before 1932. Double headed and double tailed coins are called magician's coins and are made by machining and joining parts from two real quarters. They have no numismatic value but are sold by novelty shops for $5 - $10 and are available on eBay for $2 - $3.
Double headed novelty and Magician's coins have no numismatic value, but depending on the denomination an quality most are under $10.00.
That's a novelty two-headed coin. They're sold in joke and magic shops.
Not a US Mint product. Two quarters have been glued together and it has no collectible value.
Nothing it is considered a magicians coin. They shave off one half of two quarters and then melt them together. On half will be thinner than the other.
The two trenches located on the international date line are the Tonga Trench and the Kermadec Trench. They are located in the South Pacific Ocean.
It's a novelty coin, manufactured for people who want to have a two-headed coin. But don't worry, you can still spend it like a quarter, most people don't even notice it when you buy something with a two-headed coin... that's how I always lose mine. These Magician's Coins sell regularly on eBay for a couple dollars.
They are novelty coins, manufactured for the novelty or illusionist/magician's industry. They're made by altering two normal coins and gluing the pieces back together. If you use a strong magnifier, you can probably find a seam just inside the raised rim on one side of the coin, or around the edge. Technically, they don't have any value except when someone wants one and is willing to pay for it. You can buy them in novelty shops for about $8, or on eBay for $2-$3. Sometimes people will spend their two headed coin without remembering that it isn't a real quarter. One WikiAnswers user claims to have made to a coin collection place in Detroit who said they had a real one that is selling for $100,000, if it is authentic. Sadly, no two-headed quarter has ever been certified as an authentic mint error, though one two-tailed quarter has been certified as an authentic mint error. This means that, in theory, a two-headed quarter with the same date on both sides could be authenticated, but the chances are more in favor of it being the manufactured novelty/magician's coin. Unless it's a genuine mistake that occurred in the mint, it's probably worth a few bucks at most. Two-headed quarters are often sold in magic and gag gift shops. See the Related Links for more info about these coins.