It depends on the error, the best to do is take it to a coin dealer so it can be seen.
5 thousand
There is no silver in a 1964 nickel.
None. Please don't assume that because a coin is old it has to be made of silver. All US nickels except special "war nickels" made during 1942-45 are struck in the same alloy of 25% nickel and 75% copper.
U.S. nickels weigh 5 grams each and contain 25% nickel with 75% copper.
The FS are the initials of Felix Schlag, who designed the coin. Those letters are on every Jefferson nickel from 1966 to 2004. Every single coin in that time frame is worth 5 cents.
It depends on the currency and the coin. In the US a penny is one cent, a nickel five cents, a dime ten cents, and a quarter twenty five cents.
This cant be answered unless given the mint and specific year
No. Canada stopped using silver in their 5 cent piece after 1921, and that coin was much smaller than the nickel.
There is no silver in a 1964 nickel.
All error coins need to be seen for an accurate assessment. Take it to a coin dealer for an idea of value.
A nickel.
It's difficult to say without seeing the coin but the closest matches for your description would bea coin that was dipped in acid that dissolved much of the outer surfacea "thin planchet" error due to being struck on a blank that wasn't the correct thicknessThe best approach would be to have it examined in person by a coin expert who deals with error coins.
The coin is in circulation today and its just a nickel.
It would be an unbelievably priceless error coin because Thomas Jefferson's picture is on all nickels minted since 1938. Washington is on the quarter.
If the image is centered on the coin blank like a normal nickel, you probably have a common error called a filled die. These are generally not worth anything extra. If the coin is struck off-center, its value depends on how much of the image is still visible. In any case, error coins almost always have to be examined in person by a knowledgeable dealer or appraiser.
The coin is in circulation today and its just a nickel.
Without seeing it, it's difficult to tell. It's possible the coin was affected by acid. It's surprising how much of the design remains when a coin has been "dipped" and the surface has been eroded.
Spend it, the coin is still in circulation.