I recently had this 1983 Lincoln cent evaluated by PCGS and it was attributed as struck on a defective bronze planchet weighing 2.87 grams. Originally I submitted the coin to NGC where it was encapsulated simply as AU Details (scratched), without the mint error being identified. Because the weight and surfaces seemed unusual to me, I later submitted it to PCGS where the bronze planchet was confirmed. The reverse also shows a very pronounced granular surface consistent with porosity in the planchet, which partially obscures the FG designer initials. I would be very interested to hear thoughts from error collectors. The coin will be appearing in an upcoming GreatCollections auction.
We recently had a thread about another post-1982 cent that was too heavy to be a standard copper-coated zinc planchet, but too light to be a standard bronze planchet. The TPG said that coin (1987, I think?) was bronze, but I speculated that it was zinc with a thicker-than-spec copper layer - copper is good at blocking X-rays, and I wondered if the TPG naively just accepted what an XRF scan reported. I wonder the same about this one. I'd hate to cut the coin in half to find out, but I'd be more than half tempted to crack the slab and get a specific-gravity measurement...
Hard to say what the price would be worth back looks pretty rough detail Grade If Lucky and the right people show up could sell maybe five grand hard to say with a detail grade Best of luck