Visor estereoscópico
Unis-France
View the embedded image gallery online at:
https://www.photomuseum.es/index.php/eu/component/k2/item/611-unis-france-stereoscope#sigProId445f9b3051
https://www.photomuseum.es/index.php/eu/component/k2/item/611-unis-france-stereoscope#sigProId445f9b3051