Large wooden stereoscope G.B. Italy Mignone manufactured in Alessandria, Italy, around 1850. It has a format 8.5x17cm. The interior reflective mirror is original of the time. The focus is smooth and precise and lenses are clear and clean and have no scratches or internal fungi. The stereoscope comes with 3 stereoscopic vision glasses format 8,5x17cm Paris. Measures Viewer / Glass 7,5x14,5