Not silver but a 1942 penny?

Answer 1

All 1942 pennies are made of bronze. In circulated condition they sell for a few cents. However in uncirculated condition, it could sell in a MS state between $5 to $7,500 depending on what MS it is and Which mint produced it.

You may be thinking of the famous 1943 Copper penny. in 1943 copper was saved for the war effort which meant pennies were to be made from steel and zinc.

A slip up by mint staff meant a few copper blanks were left in the machine and a handful of 1943 COPPER pennies were put into circulation.

These coins can fetch up to $400,000 plus!!!