CAC. R-7. A remarkable Gem Proof example of the famous Metric Dollar pattern, with George T. Morgan’s Coiled Hair design, struck in copper with a reeded edge. This fascinating experimental issue reflects late-19th century efforts to align U.S. coinage with the international metric system, with the reverse prominently displaying the metric equivalents for the proposed dollar denomination. The coin exhibits deeply mirrored proof fields and razor-sharp device detail throughout Liberty’s portrait and the intricate reverse inscriptions. Rich iridescent red-brown color blankets the surfaces, complemented by exceptional eye appeal and remarkable preservation consistent with the lofty PR66+ grade. Both historically intriguing and visually impressive, the Metric Dollar patterns remain among the most compelling and collectible of all U.S. pattern issues. This superbly preserved example represents a premium opportunity for the advanced pattern specialist.