The 1974 aluminum cent was a one-cent coin proposed by the United States Mint in 1973. It was composed of an alloy of aluminum and trace metals, and it was intended to replace the predominantly copper
US 00010 One Cent Aluminum
The 1942 experimental cents were pattern coins struck by the United States Mint to test alternative compositions for the penny.
1974 aluminum cent
…66 aluminum cents made in 1975 as trial strikings. At least 1 example of an aluminum Lincoln Wheat cent struck in 1942 to test a possible alternative composition to bronze for the following year. Unlike the 1974–75 aluminum cents, this coin appears to be…
1942 One Cent Pattern, Judd 2063
1942 Aluminum cent pattern obverse
1942 One Cent Pattern, Judd 2063
1942 Aluminum cent pattern reverse