That depends on factors such as the country of origin, denomination, and condition. Without knowing any of those details, an answer is impossible.
Centenary of what? What country, what coin, what year?
If this coin is indeed this year and in good or better condition. This coin can be worth a lot of money. Even in the thousands.
That's Sacagawea, not Pocahontas, and the coin is worth one dollar.
it depends what the year is and what the grade of the coin is.
It is still worth 1 dollar
How much a Harrah's coin is worth depends on the denomination of the coin and the year it was produced. Most coins from Harrah's are only worth their face value, but older coins from this casino may be collectible and more valuable.
You need to be much more specific. The value of a Kuwaiti coin will depend on the denomination, the year and the condition. Without knowing these three things about the coin, its impossible to tell you if you have a coin worth hundreds of dollars or a coin worth less than a cent.
Now that depends entirely on the dollar coin. A Sacagawea coin is worth $1. Any coin really that has been minted in the past decade or two is worth $1. Eisenhower dollars will vary a bit by year of minting and grading. Morgan, Liberty or Peace dollars will also vary depending on year of minting and grading. Be specific when you ask: denomination, type, mint year, mint location, and grade.
How much is this coin worth 186 year old
Need to know the denomination and year - and condition.
What country? What year?
It's worth one dollar.