Founded in 1932 in Rock Island, Illinois, Tru-Vue was among the first companies to restore public interest in stereography, which had declined since the 1920s. Using flexible filmstrips and later rectangular cards, Tru-Vue stereo viewers predated, competed with, and were later acquired and sold by Sawyer’s (manufacturer of the better-known Viewmaster), enjoying a large share of the stereoscope market for more than three decades.

Viewmaster History: https://youtu.be/_vpIm_U9e1M
Talking Viewmaster: https://youtu.be/PSyWSrkkNQA
ColorScope: https://youtu.be/mg-nf9P_EJY
Holmes Stereoscope: https://youtu.be/aPU5ConHwmo

0:00 Introduction
0:32 Origins of Tru-Vue
1:12 Filmstrip and Viewer Design
3:07 Filmstrip Subjects and Boxes
4:25 Transition to Colour
6:00 Acquisition by Sawyer’s
6:25 Model 502
8:00 Model 525 and Magic Eyes
8:18 Tru-Vue Projectors
9:22 End of Tru-Vue
9:46 Tru-Vue Knockoffs
10:50 Outro


SOURCES

https://brooklynstereography.com/category/obscure-formats/tru-vue/page/2/

https://www.stereoscopy.com/tru-vue/truvuestory.html

https://www.3dimensionphoto.com/vtca/Tru-Vue/Tru-Vue_viewers.htm

https://www.3dimensionphoto.com/vtca/Tru-Vue/Tru-Vue_library.htm

https://www.3dimensionphoto.com/vtca/Tru-Vue/True-View.htm

https://toytales.ca/tru-vue-viewers-from-tru-vue-company-1950s/

https://www.viewmaster.co.uk/htm/truvue.asp

https://3dstereo.com/collections/true-vue-cards?srsltid=AfmBOorVwrSEwdKHHv1dP8azT5yV9axLrPaWo8ElmXXz4bsG761t4LAB

https://stereosite.com/collecting/mid-century-35-mm-filmstrip-stereo-viewers/