Counterfeit coin??

[rsilva02667]

I went out detecting today where I found two large cents in the last two days. I found this round disk, I think it might be made of lead because it is pretty easy to bend a little. When I got it home I noticed it has letter and or numbers on it and a raised edge. Is this possibly a period counterfeit?
Thanks for looking!

 

[Slingshot]

That's why people used to bite the coins they received in transactions, lead is soft and their teeth would sink into it, and expose it as a counterfeit coin.