A signed note from Mother Teresa; a custom model 1894 Winchester rifle; and Chinese libation cups.

ANTIQUES ROADSHOW is turning Sweet Sixteen with a jaw-dropping season premiere from Tulsa, Oklahoma. In the Sooner State, host Mark L. Walberg and appraiser Nicholas Lowry head to the Pawnee Bill Ranch to look at some show-stopping Wild West posters. Highlights include a poignant signed note from Mother Teresa to a wood-carver who sent her a walking cane during her final years; a custom model 1894 Winchester rifle that may have been used in Buffalo Bill’s Wild West Show; and a collection of late 17th/early 18th-century Chinese rhinoceros horn carved libation cups — grabbing the number one spot in the list of all-time highest value ROADSHOW appraisals at $1 to $1.5 million!