Conclusion. In Washington, D.C., items include a 1964 Chrysler Turbine model and manual; a circa-1840 temperance banner; and a circa-1925 oil painting by Jessie Willcox Smith valued at $75,000. Also: miniature portraits from the 18th and 19th centuri... (more)es are examined at the Smithsonian Art Museum's Lunder Conservation lab.