Silver War Nickel 1942 - 1945?

Because of the urgent need for nickel metal during WWII, virtually all of which must be imported into the United States, the nickel or 5 cent piece was changed from 75% copper and 25% nickel to 35% silver, 9% manganese, remainder copper, in roughly October, 1942. All nickels for 1943, 1944 and 1945 were made from this alloy. Obviously, some 1942 nickles were made from the original alloy, which contains no silver, as explained above. They can be easily differentiated because the mint mark moved to above the dome of Monticello with the change, on the reverse side of the coin and, for the first time in U. S. coinage history, a "P" was added for those coins minted in Philadelphia. The copper/nickel 1942 nickels show the mint mark in the same location as the other Jefferson nickels minted since 1938 and after 1945.