STEREOSCOPE Old French, ESTEREOVISOR. 1900-1920 ', for viewing stereo slides 6 x 13 cm. This is a mirror stereoscope TOP for viewing stereoscopic views paper / photo and glass slides. Year: around 1900-1920 '. Made in France. Made of mahogany. This nice stereo display can be adjusted for a comfortable view. The viewfinder has two knobs for adjustable eyepieces. (For the distance between the eyes and optimal visual acuity) Accessory for Heidoscop Stereocamera. HEIDOPLAST 1546