Found this Emperor Constantine coin the other day in a Coinstar. It’s plated and magnetic, weighs 1.63 grams and is 18 mm at it’s widest point. Some kind of reproduction?
Here's some information about this coin: http://www.constantinethegreatcoins.com/fantasycoin/ It's pretty well known; I'm sure there's more information to be found about it. Whether or not you need more information is probably open to discussion.