The US Mint struck 1,435,000,000 one cent coins in Philadelphia mint. They struck some steel ones, due to error. There were steel blanks left over from the 1943 mint strikes, and got used. No one knows how many coins got out, all considered errors and valuable. This 1944 penny was found in my change from going to the local market. I kept it. So I am out one cent, it is worth six to ten cents now.
Over the last two years I have found less than a dozen wheat ear cents. I check all my change for wheat ear obverse pennies. I hope to find a few hundred before I quit collecting.
there was also a mistake at the mint in 1944. They struck the mint mark D over the S. These coins go for 75 to 550 dollars. They do not know how many of these repunched coins got out. I came close to finding one, but my coin is only a 1944 regular plain from Philadelphia. The fishing for coins is fun, and you do find some, even to this day. Happy hunting.