You Might Have A MILLION DOLLAR Penny 

if you own a penny from the 1940s you might be a millionaire without even knowing

it chances are you probably use one of these million dollar coins without even noticing

in 1942 a factory worker in Denver accidentally made pennies with bronze instead of copper

this caused 20 unique coins to be minted known as the d coins

if you have any pennies laying around look out for this d under the date because one of them just sold for 1.8 million