In 1973 the United States Mint proposed an aluminum one-cent coin. It was to be composed of an alloy of aluminum and trace metals, and intended to replace the predominantly copper–zinc cent due to the rising costs of coin production in the traditional bronze alloy.
Of the 1,571,167 coins struck in anticipation of release, none were released into circulation. In an effort to gain acceptance for the new composition, the Mint distributed approximately three dozen examples to various members of the House Banking and Currency Committee and the Senate Banking, Housing, and Urban Affairs Committee. Nine congressmen and four senators received examples, along with some Treasury officials. Additional specimens were given out by then Mint Director Mary Brooks. Ultimately, the proposal was rejected in Congress, due mainly to the efforts of the copper-mining and vending machine industries, which felt the coins would cause mechanical problems. Opposition also came from pediatricians and pediatric radiologists who pointed out the radiodensity of the metal inside the respiratory and gastrointestinal tracts was close to that of soft tissue, and therefore would be difficult to detect in X-ray imaging. In addition, the price of copper declined enough that making copper cents would again be economically viable, and conversely made hoarding pointless. The idea of changing the composition of the cent would not be explored again until the 1980s.
After the setback, the US Mint recalled the coins, but about 12 to 14 aluminum cents were never returned to the mint. No oversight, record keeping, or statement that the coins had to be returned was made by the US Mint as examples were handed out. When Federal Bureau of Investigation and other government law enforcement agencies were called in to investigate, however, some congressmen either feigned ignorance or completely denied getting examples. One left over coin was donated to the Smithsonian Institution, while another was alleged to have been found by a US Capitol Police Officer. A 1974-D specimen was found in January 2014 by Randall Lawrence, who said it was a retirement gift to his father, who worked at the Mint in Denver. Randall planned on selling it in a public auction, but the Mint demanded its return, saying that the coin was never authorized for release and therefore remains U.S. Government property. Lawrence (and his business partner at their coin store, Michael McConnell) ultimately surrendered the coin when the Mint showed that the aluminum cent had never been authorized to be struck in Denver, and there was no evidence that the coin had been a gift of any kind.