Vintage Keystone Comfort Stereoscope Stereo Viewer Stereoptic Model 40 And Cards For SaleYou are offerding on a vintage, KEYSTONE, EYE COMFORT SERIES, MODEL 40, stereoscope/stereo viewer/stereoptic view, with a complete set of 12, original stereoview cards; they were designed to test and stengthen visual, depth perception. The original, instruction booklet and scale diagram are also included. The wooden viewer, itself, measures approximately 15" in length and is in excellent condition with no splits or breaks in the wood; it is marked to scale, as shown. The brown, metal eyepiece has no dents or rust, and the lenses are perfectly clear with no cracks or chips; all hardware is present and secure. The instruction booklet is dated 1943, as shown in my 11th photo. Please email with any questions. Shipping insurance is included.
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