In Tulsa, Oklahoma, once nicknamed the "Oil Capital of the World," ANTIQUES ROADSHOW host Mark L. Walberg joins appraiser Noel Barrett at the Woolaroc Museum & Wildlife Preserve to check out some vintage petroliana collectibles. Highlights include a 1960 first-edition To Kill a Mockingbird with an inscription by Harper Lee; a collection of bronzes that may or may not be Remingtons and Russells; and an extremely rare 1924 Gibson F-5 "Lloyd Loar" mandolin, stored in a farmhouse closet since the Great Depression, and valued at $175,000.