| Book featuring stereograms (optical illusions in which 2D images appear to be 3D) |
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| '90s optical illusion fad |
Universal |
27 Jan 2023 |
| '90s optical illusion fad |
Universal |
12 Mar 2021 |
| Wise men about to look at radio tuner |
The Telegraph Toughie |
01 Aug 2019 |
| Photoelectric cell |
The Times Concise |
14 Feb 2018 |
| Tricks to observe for tuning a radio |
Irish Times Crosaire |
14 Sep 2017 |
| 1990s series of autostereogram books |
The Times Specialist Sunday |
27 Aug 2017 |
| *1990s 3-D picture fad |
Wall Street Journal |
10 Dec 2015 |
| Small cathode-ray tube in radio receiver to help tuning |
The Telegraph General Knowledge |
16 Aug 2015 |
| *1990s 3-D picture fad |
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| 3-D trick-picture fad of the '90s |
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| Radio receiver's tuning aide |
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| 3-D trick-picture fad |
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