The Jefferson nickels struck in Wartime alloy (copper-silver-manganese) form a set-within-a-set that is interesting to the historian, the WWII buff, and the collector. Only eleven coins are in the set, 1942-1945, P-D-S. They can be collected in circulated condition or all in Mint State. And they are a special set, as the coins have a large mintmark on the reverse, above Monticello, including the Philadelphia Mint issues.
Circulated War nickels have a scruffy look. They can still be found in change; I found one fairly recently. Uncirculated War nickels are a pretty white color, due to the silver content. Some may have attractive toning. I once owned a 1943-S with pink and green toning on the reverse. Those desiring a proof specimen need the 1942-P, a coin in demand from type collectors too.
There are a few varieties, such as the 1943/2 overdate, a 1943-P "doubled eye" of Jefferson, and 1945-P with a double die reverse.
The War nickels can be housed within a Jefferson set, or in its own holder. Special holders are available, often depicting a scene from World War II. Such a set would make a nice gift for a veteran or a World War II buff. WWII items are very popular now.
History, silver, a short set worth completing...War nickels.