GUEST: I was just searching around online for items from Marshall Field's. It was $20, so I thought, "I'm gonna take it."

APPRAISER: Marshall Field's was one of those grand old American department stores that had, among other things, an antiques department. It's a French enamel plaque. There is the artist signature here, "Georges Jean," and "1880." Just exquisite. The auction estimate would be at least $1,000, and perhaps as much as $1,500.