War silver nickels were minted between 1942 and 1945 and are distinguished by the enlarged mintmark on the reverse above the Monticello dome.
There are 11 total date/mm combination of war silver Jefferson.
Always willing to answer any question ... but suggest you consider purchasing a reference book for your new hobby ... the
RedBook is loaded with tons of facts and is an excellent springboard for a newer collector to gain some basic knowledge.
Knowledge is the key to collecting success.

David
Take a look at my other hobby ...
http://www.jk-dk.art