Great Smoky Mountains National Park ViewMaster - Great Smoky Mountains National Park I-II-III. - 3 Classic Vintage 3D Reels Produced in Portland, Oregon during the early 1950s, these 3 reels retain their vibrant colors. They are very gently used Great Smoky Mountains National Park Reels and Lookout Mountain Reel - Views from the 1950s What a way to view the world - in 3D. Yes, View-Master images are in 3D and that's what makes them so real. You will need-Master viewer to view the 3D images - available here on Amazon Each comes with its own white sleeve.