At first I thought this was just die deterioration but when I checked Coppercoins site it looks identical. The only thing is no die scratches... Is that possible? http://coppercoins.com/lincoln/diestate.php?date=1968&die_id=1968d1do005&die_state=mds
It's not the 1968D 005. That doubled die shows clearly at the inside base of the serif on the G. Your coin has a lot of die deterioration going on, but I don't see that clear separation on the the serif.
By god you are right! thank you. oh well I was gonna toss it anyway then I saw that -005 pic and thought I had it.