(Kelly of the Clue Crew reports from the Denver Mint.) Production of quarters starts with coils of metal fed into a press; it's mainly this metal, that's more associated with pennies
...... United States Steel Corp. charged that the Treasury should impose... [DOC] [TLE] Full text of "Mining and Scientific Press (July-Dec. 1907)" [PAR] Miners Association Camp Bird Mine Capitalization of Rand Mines