1958 Lincoln Penny Die Error?

[NewObsession]

Snagged this out of a give a penny take a penny cup at the local convenience store last week (exchanged it for a nickel).   Wondering if it is a die error and if so is it worth keeping?

[Conder101]

The Obverse die that struck this coin had a piece chipped out of the die between the middle and lower bar of the E in LIBERTY.  Since a piece of the die is missing the planchet metal filled the void creating the raised lump in the bottom of the E.  It is normally considered to be an error (although actually it is really a die stage and not really an error).  You might want to keep it but it has very little premium value.  If you were lucky it might be worth a quarter.  But it is a nice "teaching" piece to illustrate an example of a die chip.

[NewObsession]

Thank You!!