Nickel was being conserved at this point to craft supplies in the war effort. The reason hb said "too bad it's not a 1944" is because there are very few known (only one I think) examples of a tombac 1944 five cent piece. There are probably very few tombac coins in circulation, as their colour stands out quite dramatically. They can be purchased from dealers quite cheap, but if you ever hope to find a 1944 tombac your best best is to hope your parents or grandparents have one in the attic