I believe this is a cud as it starts on the rim and is fairly large for a penny.

Can anyone tell me what this 1982 Regina set is made of..? The card that comes with this set states that the 10¢,25¢,50¢,$1.00 are all nickel. I accidentally dropped a magnet on the side of the set where the dime is and the magnet stuck to the dime. It stayed on the the other 3 as well. Any help is ...