1920 muled error? Opened my first roll in a while and the first thing that caught my eye was this foreign coin and then i found it to be old 1920 so i flipped it as i would any coin but it was upside down i took a closer look and found it to be a mule coin. Not sure though if Old Canadian coins from 1920 were supposed to be muled or not. Also I am not sure if this was the place to post so sorry if i made a mistake. Thanks for viewing.