Usually of a small size , they were most commonly viewed in a small hand - held box - type stereoscope .
Stereoscopic Autochromes were especially popular , the combined color and depth proving to be a bewitching experience to early 20th Century eyes .
Usually of a small size , Stereoscopic Autochromes were most commonly viewed in a small hand - held box - type stereoscope .
Stereoscopic Autochromes were especially popular , the combined color and depth proving to be a bewitching experience to early 20th Century eyes .