Part 2 of three. Appraised in Chicago: an 18th-century map of Virginia and Maryland and an 1871 map of Chicago that highlights the burned areas of the city; an 18th-century Irish silver sauce boat; an 1880s "aesthetic-movement" table; Tiffany stained glass from the men's grill at Chicago's Marshall Field department store. Then there's a Russian bodice ornament with a value that pleasantly surprises its owner---so much so that she kisses the appraiser who gave her the good news. Meanwhile, host Lara Spencer learns the difference between "toy" and "model" trains during a visit to Chicago's Museum of Science and Industry