Be more specific, which coin? Also compare your coin to others - remember the backs of ALL US Coins are oriented 180º versus the front.
Upside down is relative to which way you flip the coin. If flipping from top to bottom, the eagle should be upright. If flipping from side to side, the eagle should be upside-down. If the eagle is truly upside down from the way it should be, AND the coin has not been altered, then it could be worth a couple of hundred dollars.
All 1967 US quarter dollars have the eagle upside down.
The eagle is supposed to be upside down. In order to give an accurate estimate of the value of your coin, the denomination must be known. Please examine your coin and then submit a new question with the needed information.
First verify that the back side really is struck upside-down. Hold the coin with Kennedy's face upright. Your fingers should be holding the coin on the right & left sides -- NOT at the top & bottom. Now when you flip the coin over, the Kennedy head becomes upside-down (on the side away from you), and the eagle should be right-side-up facing you. This is known as a "coin turn". If you were holding the coin at the top & bottom when you flip it, the Kennedy head would remain right side up (on the back side), and the eagle would (normally) be upside-down facing you. This is called a "medal turn". If you did the above "coin turn", and the eagle is now upside-down, then you have a rare rotated die error -- perhaps worth hundreds of dollars. If you did the "coin turn" and the eagle is now right-side-up, you have a normal coin.
They are all upside down. Mints often rotate the obverse and reverse sides of the coin so they are 180 degrees apart. Each side appears to be upside down to the other side.
All U.S. coins have the reverse image upside down to the obverse. Look at any other coin you have. It's just 50 cents.
No. All US dollar coins have the reverse side of the coin 180 degrees in rotation from the obverse side of the coin.
First you must determine if the reverse is upside down. All US coins are struck as "coin turned" meaning the reverse is upside down from the obverse. lay the coin flat on a table with the obverse up, turn it from left to right. If the eagle is upside down this is normal. If it's not, you have whats called a "Rotated Die" error that must be seen for an assessment of value. In general, the 1890 Philadelphia issued Morgan (no mintmark) is considered common. Circulated coins run from $30.00-$40.00 depending on the grade of the coin.
Eisenhower was on the one dollar coin, and it's worth one dollar.
No. They are all upside down. The mint strikes each side of the coin 180 degrees in rotation from each other.
By "upside down", do you mean that the eagle is upside down when you flip the coin side to side, like the pages of a book, or top to bottom, like a calendar? Compare your dollar to any coin in your pocket change. If the eagle is upside down when flipped side to side, just like the other coins, you have a normal silver dollar worth maybe $12 to $15 depending on condition. If it's upside down when flipped like a calendar, you could have a mint error that needs to be checked by a specialist. Note that nearly all U.S. coins use what's called "coin rotation", where the front and back (obverse and reverse) are opposite in orientation. Some other countries (Canada, U.K., EU, for example) use "medal rotation" where the obverse and reverse point the same direction. It's just a matter of what each issuer's mints chose to use.
No US Half dollars struck for general circulation after 1970 contain any silver. the coin is 50 cents.