What year is the most valuable penny from?

Answer 1

1943.

In 1943, to save copper for the war effort pennies were struck in zinc coated steel, however some copper blanks made their way into the press and were struck by accident, there are only a handful of known genuine examples of a copper 1943 penny and they can be worth in excess of 1 million dollars. However, steel 1943 pennies are incredibly common and are worth about 5 cents in circulated condition or a buck or two if uncirculated. An easy way to check if you have a steel or a copper penny is to hold a magnet up to it, the magnet will stick to the steel penny and not the copper penny.

Answer 2

1943