Visor estereoscópico
Stereo Optical Corporation
View the embedded image gallery online at:
https://www.photomuseum.es/index.php/eu/component/k2/item/632-stereo-optical/visor-estereoscopico#sigProIda10eaf76ba
https://www.photomuseum.es/index.php/eu/component/k2/item/632-stereo-optical/visor-estereoscopico#sigProIda10eaf76ba