Here is a complete set of Silver War Nickels. In the years of World War II, nickel (the metal) was at a shortage, and so the mint decided to remove nickel from the five cent piece, in order to save the nickel for the war effort. The prewar composition was 75% copper and 25% nickel, and the composition was changed to 56% copper, 35% silver, and 9% manganese for these war nickels. As a way to identify these nickels more easily, the mintmark was enlarged and moved from the right of Monticello to just above the dome of Monticello. All the years and mintmarks from '42 to '45 were made except 1942-D. So there are 11 war nickels total. They are all certified authentic by SGS and the set will come with a Certificate of Authenticity.