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The "moneda columnaria," or "columnar coinage," was a distinctive Spanish silver coin minted from 1732 to 1771. Its most recognizable features were the Pillars of Hercules and the motto "Plus Ultra" on one side, and two crowned hemispheres on the other. This coin, also known as the Spanish milled dollar or peso fuerte, became an international currency due to its uniform standard and milling. The design was later replaced by a bust of the reigning monarch on one side and the royal coat of arms on the other. The origin of the dollar sign ($) is widely believed to stem from this Spanish milled dollar.1234

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