In 1941, the United States went to war. And from late 1942 through 1945, our nickels were zero percent nickel, but 35 percent silver. These silver nickels are known as War Nickels.

Why the change? And why was a less-expensive metal replaced by a more-expensive metal?

Why were those huge mint marks put on our War Nickels but no other coins?

And why did we go back to nickel nickels, and small mint marks, after the war?

Learn the answers in this week's edition of In the Treasure Corner.

Listen at http://thetreasurecorner.com.