...5 cents. It contains no precious metals and having no mintmark simply means that the coin was minted in Philadelphia (most coins wouldn't start having a "P" on them for Philadelphia until later and pennies still don't contain the mintmark).
It's still only worth 5 cents.
A 1943-P nickel in average condition is worth 75 cents to a dollar because it contains a bit less than two grams of silver. A 1954 nickel couldn't have a P mint mark because that letter didn't appear on nickels from 1946 to 1979 inclusive. However 1954 is a common date; in average condition its retail value is only about a dime. To explain the presence of silver in a 1943 nickel, it's a special "war nickel" minted during WWII. War nickels were made of an alloy of 56% copper, 35% silver, and 9% manganese because nickel metal was needed for the war effort. Minting began in late 1942 and continued until the end of 1945. The large mint mark letter over the dome of Monticello on the back was used to indicate the composition change.
$2 to $9000 depending upon the mint mark and the condition of the coin.
A uncirculated 1954 Jefferson Nickel (note spelling) is 25 cents. A coin without a 'D' or 'S' mintmark was made at the Philadelphia Mint. If you found it in change, it's likely not uncirculated. The coin contains no silver and is just face value.
This will vary greatly depending on date and mint mark.
5 cents.
Five cents
9.0000
It's still only worth 5 cents.
The value would depend on the condition and date of the coin.
100-700 usd
The value of a Jefferson nickel with a p mint mark will vary depending on the year and the condition of the coin itself. A person should have the coin appraised for an accurate value.
A 1943-P nickel in average condition is worth 75 cents to a dollar because it contains a bit less than two grams of silver. A 1954 nickel couldn't have a P mint mark because that letter didn't appear on nickels from 1946 to 1979 inclusive. However 1954 is a common date; in average condition its retail value is only about a dime. To explain the presence of silver in a 1943 nickel, it's a special "war nickel" minted during WWII. War nickels were made of an alloy of 56% copper, 35% silver, and 9% manganese because nickel metal was needed for the war effort. Minting began in late 1942 and continued until the end of 1945. The large mint mark letter over the dome of Monticello on the back was used to indicate the composition change.
July 25, 2009 The value of a circulated Jefferson war nickel is based mainly upon the value of the silver they contain which is $0.78 today. In uncirculated collector coins the values vary greatly with the year and mint mark. To establish an estimated value for an uncirculated Jefferson war nickel, the year and mint mark must be known.
It may be a little older but is very common, just face value.
Without seeing the mark it is difficult to give an estimated value. The mint did not intentionally make a nickel with a mark above the head but sometimes damage to the dies will create a mark. I would suggest you take it to a coin dealer who can actually see what you have and perhaps can give you more information about it.
$2 to $9000 depending upon the mint mark and the condition of the coin.