Historical Figures

What does CA mean on a St Gaudens 20 dollar gold piece?

The "CA" on a St. Gaudens $20 gold piece stands for "Chief Assayer." The Chief Assayer was the highest-ranking official at the United States Mint responsible for the quality of the coins produced. The Chief Assayer's mark was placed on all gold and silver coins minted in the United States from 1873 to 1983.
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