Keystone View Co Eye Comfort Stereoscope Antique Wood Metal Stereoviewer For Sale

Antique Keystone View Co Eye Comfort Stereoscope Model 40 hand-held viewer features a classic wooden frame with a textured metal hood. This vintage optical instrument includes a sliding card holder and a graduated scale for focal adjustment, reflecting its historical use in vision therapy and stereoscopic viewing. The piece exhibits a rich aged patina, showcasing its authentic heritage. Please note there are some signs of age, including minor scuffs and wear consistent with its vintage nature; refer to the photos for a detailed look at the condition.