Lincoln reverse 0

[Pdv006]

Good afternoon

I have a few pennies that looks to be stamped hard on the reverse. It shows the base metal above United States of America letters . I cant get a good picture to show. Any help would be good. 

Thanks.

[Greenstang]

Welcome to the Forum

It sounds like split plating but will need clear photos of both sides to confirm.

[Coinbuf]

If the pennies you have were made after 1982 those coins are a zinc core with a very thin copper plating.  Sometimes so thin that when coined the plating will stretch and break creating split plating as @Greenstang noted above.   If you google split plating you will find some examples to compare to yours.