Visor estereoscópico
Breveté
View the embedded image gallery online at:
https://photomuseum.es/index.php/es/component/k2/item/633-brevete-stereoscope-lestrade-simple#sigProIdfbc8e91f72
https://photomuseum.es/index.php/es/component/k2/item/633-brevete-stereoscope-lestrade-simple#sigProIdfbc8e91f72