Unusual 40's Keystone Quack Medical Stereoscope in Original Box, 5 stereoviews $41.00 USD Sold on: 2013-Nov-04 Marketplace: eBay 2 Treasure 0 Trash 100% Detail: As stereoviews went out of fashion in the 30's and 40's Keystone got into the quack medical device business I would guess, hence this stereoscope that purportedly trains your eyes to see better (and w... More Relevance Historical Items
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