View-Master® Master
/One of my jobs before I fled hollywood was stereographer, or "the guy in charge of the 3D". If you're one of the six people who saw Hansel & Gretel in 3D and didn't get a headache, you're welcome. I've been a stereo enthusiast all my life, and I'm certain it's because of one of these devices, or at least the real thing that inspired Bruce Lowell to build this marvelous MOC. I remember staring in wonder at my Disneyland reels as a kid and marveling at the technology.