William Shatner Signed Autographed Star Trek The Motion Picture 11×17 Poster JSA. See our other items. This 11×17 poster of William Shatner’s signature is a must-have for any Star Trek fan. The autograph has been authenticated by James Spence (JSA), adding to its value and rarity. This original piece is perfect for collectors of entertainment memorabilia and moviel items. The poster is in excellent shape. It is a great addition to any movie or Star Trek collection. NEW INVENTORY ADDED DAILY. All orders after 4pm est. Orders after 4pm est. SPORTS CARDS AND MEMORABILIA&#######xA0.