i recently discovered a Lincoln cent that has a memorial reverse and weighs 2.5 grams! it may be a struct through coin, yet I know of no Memorial cent that weighs 2.5 grms, outside of the 1982 Zinc coin that were minted that year. It's not a Zinc cent in that its center is exposed. I've posted photo's should you care to look at them and assist the community and myself in attempting to identify it. Thanks.