The Vintage View Master Picture Viewer is a stereoscope that allows users to view 3D images on a cardboard reel. This particular product is a single piece and is in its original condition. It was manufactured in the United States during the 1950s by View-Master. The viewer is made of plastic and metal and is designed to hold the cardboard reels. The product is vintage and is a great find for collectors of photography and stereoviews.