WILLIAMSBURG, Va. – A 17th-century caudle cup that belonged to the Puritan congregation of the First Church of Christ in Farmington, Connecticut, and was used there as a vessel for sacramental wine, was recently acquired by the Colonial Williamsburg Foundation, making it the earliest piece of American silver in its famed collection. The cup, wrought around 1670 in Boston, Massachusetts, was fashioned by the first silversmiths making goods in what is now the United States.