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Message:: [QUOTE="funnycoins, post: 3613121, member: 103887"]quotation from Stack's and Bowers"Discovered several years ago while our consignor Jeff Young was searching through rolls of cents, this 1983-D cent struck on a bronze cent planchet remains unique, making it rarer even than the 1974 experimental aluminum cents. The Unique Example From the Denver Mint 1983-D Lincoln Cent--Struck on a Bronze Planchet--AU-55 (PCGS). 3.10 grams. This planchet error is similar in nature to the 1943 Copper cents and occurred in precisely the same manner. The 1983-D copper planchet cents are destined to remain quite rare as the change from the old tenor copper (also known as bronze or brass) planchets to the new 97.5% zinc and 2.5% copper planchets occurred in October of 1982 at the Denver Mint, at least two months before 1983-D cents were struck. Quality control was also very high at the Denver Mint in this time period, undoubtedly leaving few such errors to be discovered. I did not quote that but hyperlinked a NYTimes story A version of this article appears in print on August 29, 1981, on Page 2002031 of the National edition with the headline: ZINC PENNY RULING IS EXPECTED SOON. I would say yes congressional debates must have gone on to carry this issue out for decades as the Copper and Brass Fabricators Council did.[/QUOTE]