These are the 20 most valuable pennies, and they're worth a combined $5.5 million. Standards have been developed to evaluate coins. A modified version of the Sheldon Scale, which grades coins on a ...

During World War II, pennies were made of steel to save copper for the war effort. However, a few were mistakenly made of bronze, and these are extremely rare and valuable. Made of 95% copper and ...

Brenner, this is one of the highest-value pennies in circulation today. During World War II, pennies were made of steel to save copper for the war effort. However, a few were mistakenly made of bronze ...