The Jones Pottery of Pittston, Pennsylvania, operated in the 19th century by Evan R. Jones and Evan B. Jones. The Marks Project, a 501(c)(3) not-for-profit educational organization. A post shared by Knowspickers (@knowspickers). HeidiRit New Member. "Marks can also date the piece," Slavid says. George Ohr was a one-of-a-kind craftsman who went against the grain of the Arts and Crafts movements need for simplicity, control, and perfection in the work they produced. [CDATA[// >