As of July 2013, the value of a 1896 1 US dollar is between $15 and $250. The actual value depends on the condition of the coin and the overall demand from collectors.
nothing
If it's a US 1 cent coin it's zinc not copper and value is 1 cent
It is worth as much as 60$ to 120$.
...the face value is $1.
This question comes up fairly often and is a common misunderstanding. US $1 coins made up till 1935 aren't called "eagles" and they don't contain 1 oz of silver. They were ordinary circulation coins made for use in daily commerce. While they do contain silver, it's not as much - about 3/4 of a troy ounce. "Silver eagles" are modern (1986 and later) coins sold by the Mint as investment pieces, not for spending; their value is linked to the current price of silver and the "$1" value is purely artificial. The coin you have is frequently called a Morgan dollar after its designer. Its value when minted was in fact exactly $1 because silver was much cheaper and its price was controlled. Today it has value not only for its silver content but for its interest to collectors. There's more information at the Related Question.
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No Carson City Morgans were struck in 1896
The value keeps on changing daily. For simple calculating purposes, you may take 1 USD = 50 INR, which is the approximate value for 1 US dollar.
1 US cent has the same value the world over! i.e. 1 US cent
The lowest value US stamp was the 1/2 cent. A couple different versions were issued.
Please check your bill again and post a new, separate question. The last red-seal $1 silver certificates were printed in 1896. All later $1 silver certificates had blue seals.
If it's a US 1 cent coin it's zinc not copper and value is 1 cent
It is worth as much as 60$ to 120$.
...the face value is $1.
$1.00
No US $1 bills are dated 1990.
Hawaii belongs to the US so do the math with the dollar. Is about twice the value.