Mignon Stéréo Viewer

France / Germany, 1910s

Measuring at slightly under 2.5" × 3.5", the box for this decorative viewer claims it was "the smallest stereoscopical apparatus of the world." The glass slides are no bigger than my little finger. Supposedly manufactured by Max Skladanowsky, a German inventor and filmmaker who, along with his brother, invented the Bioscop movie projector.

Primary Material: Cardboard
Media Format: Small glass stereo slide
Light Source: Natural light
Focus: Adjustable
Interocular: Fixed