Visor estereoscópico
Breveté
View the embedded image gallery online at:
https://photomuseum.es/index.php/eu/component/k2/item/769-brevete-simplex#sigProId6af811e21c
https://photomuseum.es/index.php/eu/component/k2/item/769-brevete-simplex#sigProId6af811e21c