ANTIQUES ROADSHOW headed west to Oklahoma's capital, where host Lara Spencer and Part 2. Items appraised in Oklahoma City include an 1801 Lewis and Clark "peace medallion"; paintings of Geronimo and a bison; European Art-Deco travel posters; sketches of Tallulah Bankhead, Leslie Howard and Amelia Earhart; and Oglala Sioux family heirlooms. Also: appraiser Beth Szescila tells host Lara Spencer what to look for when assessing quilts; appraiser Nicholas Dawes discusses floral-decorated porcelain.