PCGS (1943) Lincoln steel cent split before strike and with a uniface obverse. The coin weighs only 1.42 grams, which is about half the normal weight. Also, the obverse side is uniface from having been struck with another planchet on top of it.
A rare error type on steel cents, and only a few known.
PCGS 1907 Indian cent split before strike. The coin is struck on a planchet that split in half before strike, resulting in a coin thinner than normal, and weighing about half the weight of a normal...