![](https://coimages.sciencemuseumgroup.org.uk/519/997/large_thumbnail_1990_5036_5040__0001_.jpg)
![Owl Stereoviewer Prototype](https://coimages.sciencemuseumgroup.org.uk/314/532/small_thumbnail_br180092.jpg)
![Owl Stereoviewer Prototype](https://coimages.sciencemuseumgroup.org.uk/314/530/small_thumbnail_br180091.jpg)
![Owl Stereoviewer Prototype](https://coimages.sciencemuseumgroup.org.uk/314/533/small_thumbnail_br180093.jpg)
![This stereo viewer prototype was invented and developed by](https://coimages.sciencemuseumgroup.org.uk/314/528/small_thumbnail_2018_0243__0001_.jpg)
![This stereo viewer prototype was invented and developed by](https://coimages.sciencemuseumgroup.org.uk/314/531/small_thumbnail_2018_0243__0003_.jpg)
![This stereo viewer prototype was invented and developed by](https://coimages.sciencemuseumgroup.org.uk/314/529/small_thumbnail_2018_0243__0002_.jpg)
This stereo viewer prototype was invented and developed by Brian May, who owns a large collection of stereo views, stereo technology and ephemera. Brian May also acquired the copyright for the London Stereoscopic Company - one of the largest and most popular stereo companies in the 19th century, The OWL viewer, which this is a prototype of, is used to view modern and historical stereo views. The ingenuity of the viewer is that it can be folded flat, for ease of transportation.