This Massive Collection of More Than a Million Tools Tells the Striking History of Jewelry Making in America

Kevin Potter, a jeweler based in Tucson, Arizona, has assembled the world's largest collection of artifacts from America's industrial jewelry manufacturing era. His collection, housed in two warehouses, contains an estimated 1.2 million hubs and dies—the hand-carved steel tools used to mass-produce jewelry through die-striking—along with related machinery and ephemera, preserving a vast physical archive of a vanished craft.