The coin has likely been cleaned.
NICKELS dated 1940 & 1941 arre made from .750 copper and .250 nickel.
All U.S. nickels from 1866 to 1941 are made from 75% copper & 25% nickel. From Oct 1942 through 1945 the nickel in the coin was replaced with silver. In the 1946 the composition went back to copper-nickel.
An alloy of 25% nickel and 75% copper. That's the same metal as all other dates for nickels except the famous "war nickels" from 1942-45.
Please check your coin again. Liberty nickels were minted from 1883 to 1912. A 1941 nickel would be a Jefferson nickel. There's more information at the question "What is the value of a 1941 US nickel?".
Buffalo nickels were minted from 1913 to 1938
Please don't assume that because a coin is old it has to be made of silver. It's made of copper-nickel like all other nickels except the WWII ones with a large mint mark above the dome of Monticello. 1941 is not a rare date for Jefferson nickels. There's more information at the question "What is the value of a 1941 US nickel?".
Except for special "war nickels" minted from late 1942 to 1945, all US nickels are made of an alloy of 25% nickel and 75% copper. However your coin could not be a Liberty Head nickel. They were minted from 1883 to 1912. A 1941 nickel would be a Jefferson nickel.
The same nickel alloy that is used today. 75% copper, 25% nickel. In fact, the nickel still has the composition that original nickels had back in 1866 when the first nickels were struck. The only change to the nickel is during WWII on nickels dated 1941-1945 with a large mintmark over the Monticello, those nickels are 56% copper, 35% copper, and 9% manganese.
To clear things up, 1941 nickels aren't war nickels. The US didn't enter WWII until December of that year, and war nickel production didn't start until 10 months later. All 1941 nickels were struck in the standard alloy of 75% copper and 25% nickel, so a copper-colored coin could result from exposure to heat or chemicals. In particular, nickels are often copper-plated in high-school chemistry experiments.
Silver was only used in nickels during WWII. Every nickel 1866-1941 and 1946-present has used the same blend of 75% copper with 25% nickel.
None. 1942-1945 were the only years silver was used to make nickels.
16 different Jefferson nickels are in this span of dates, 11 are 35% silver, 5 are cppper-nickel. Post new question.