Visor estereoscópico
View Master
View the embedded image gallery online at:
http://photomuseum.es/index.php/es/component/k2/item/631-view-master-fossil#sigProIdee1a1d79ef
http://photomuseum.es/index.php/es/component/k2/item/631-view-master-fossil#sigProIdee1a1d79ef