William Pietri @williampietri.sfba.social.ap.brid.gy · 16/01/2026There was another wave of 3D during the rise of coin-operated machinery. Here, a device from 1905. 2/ 120
William Pietri @williampietri.sfba.social.ap.brid.gy · 16/01/2026By the 1940s, thanks to amazing technical advance, the future arrived not just for postcards but for education. The US military bought 100,000 viewers and 6 million reels to educate soldiers and sailors. 3/ 110
Mark Burton @markhburton.mstdn.social.ap.brid.gy · 17/01/2026@williampietri I had a viewer like this! Bought with cereal packet coupons to view animal pictures that came with the cereal. Weetabix, I think. About 1960. 000
William Pietri @williampietri.sfba.social.ap.brid.gy · 16/01/2026Then in 1952-1954 came the future of movies: anaglyph (aka red/blue) 3D: 010
