Stereocard
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The stereocard (also called stereo card, stereograph card, stereogram, or stereo view) is a pair of photographic prints mounted on card stock and viewed through a stereoscope to produce a three dimensional image. Stereocards were in popular use from the 1880s through the 1930s. The later ViewMaster operated on similar principles, but with multiple images in slide-film form around a circular card.
References
- Stereograph Cards U.S. Library Of Congress
- A Visual History Of The Stereoscope Del Philips
