M is the monogram of George Morgan, the coin's designer - hence, Morgan dollar !
You need to look on the back for a mint mark. See Related Questions for more specific information.
Lowest value would be $15.00 just for the silver.
There was no US silver dollar minted in 1950. If you mean a half dollar, it would be worth at least its value in silver which as of writing is about $7.70 but it would be worth more in better condition. As with all old coins, cleaning harms the value.
A 1924 Silver Dollar would include the Peace Dollar. If its mint state is very good (VG-8), the value is: $20. Should the mint state be MS-60, the value increases to: $35. A 1924 silver dollar is a Peace dollar, values for circulated coins are $17.00-$26.00. The term "Mint State" is used only for uncirculated coins.
Please, turn the coin over and look at the denomination on the back. It's a HALF dollar, not a dollar. The 1964 Kennedy half is a 90% silver coin, but very common. The value would be only for the silver, about $15.00 as of 9-1-11.
A Morgan Silver Dollar contains 26.73g of 90% silver. As of today (11 July 2011), the price of silver is about $1148/kg, so the value of the silver would be (0.02673 * 0.90 * $1148) = $27.62. Depending on the condition and mint markings, the coin may be worth more or less than its melt value.
Lowest value would be $15.00 just for the silver.
There was no US silver dollar minted in 1950. If you mean a half dollar, it would be worth at least its value in silver which as of writing is about $7.70 but it would be worth more in better condition. As with all old coins, cleaning harms the value.
The 1972 Eisenhower dollar has no silver in it and the gold plating don't do nothing for the value but it's still a dollar
The value of a 1949 Canadian silver dollar depends on the condition of the coin. Such a coin would fetch between 21 and 27 US dollars at auction.
It's a common coin, still worth one dollar.
Sacagawea silver dollar coins were not minted in 1979. The first year of issue for Sacagawea dollar coins was 2000, and they are made of a copper-nickel clad composition, not silver.
The value of a Silver Eagle coins is determined by the spot price of silver which right now is $29.23 which would be what your coin is worth, with perhaps another dollar added depending on condition for the coin itself.
A certified example would have a average retail value of $2,000.00
A 1924 Silver Dollar would include the Peace Dollar. If its mint state is very good (VG-8), the value is: $20. Should the mint state be MS-60, the value increases to: $35. A 1924 silver dollar is a Peace dollar, values for circulated coins are $17.00-$26.00. The term "Mint State" is used only for uncirculated coins.
Please, turn the coin over and look at the denomination on the back. It's a HALF dollar, not a dollar. The 1964 Kennedy half is a 90% silver coin, but very common. The value would be only for the silver, about $15.00 as of 9-1-11.
A Morgan Silver Dollar contains 26.73g of 90% silver. As of today (11 July 2011), the price of silver is about $1148/kg, so the value of the silver would be (0.02673 * 0.90 * $1148) = $27.62. Depending on the condition and mint markings, the coin may be worth more or less than its melt value.
The coin is a Morgan dollar and assuming no little letters on the back of the coin under the eagle (S-O-CC) the value is $17.00-$26.00