4 jan 1939 ano - View-Master
Descrição:
William Gruber invented a stereoscopic viewing device that uses reels of 7 3D images in full colour. During World War II, the army used 5,000,000 reels to train recruits to identify enemy ships.
http://jaredjared.com/wp-content/uploads/2011/10/Bendis-Stereoscopy.pdf
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