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In the 1960s, the 3D effect was shown on TV without need of special tv set or glasses. When was this and where I can find further information.
There is no further information. It never happened. The technology simply could not even begin to do it. They couldn't even show regular 3D needing glasses on television because the rollover rate of the television and the frame rate of the 3D interfered with each other. Plus, if it had ever happened, I would remember.
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Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them