60-70s Viewmaster 3D stereo viewer black stand-alone

VIEWMASTER was first used to identify enemy weapons for World War II US military training. Later, for the sake of marketing, it was positioned as a toy. Before the 3D movie, there were many children watching movies in the United States. In addition to cartoons, these 3D films have many world-wide landscape introductions. Movie albums. Science life.... The 1939 invention has been in existence for more than 70 years. This thing is really historical, and it can really be passed down from generation to generation so that the next generation can also come into contact with this good invention. Buy a machine and send a slide to Europe! Other slides can be purchased at ask Thank you Origin / manufacturing methods USA