I have had it for about 20 years just sitting on a shelf. No idea what it was used for but looks very old. Quite a unique novelty item. There is a crack in the wood frame.
This item is in the category "Collectibles\Science & Medicine (1930-Now)\Optical\Other Optical Collectibles". The seller is "your_altitude" and is located in this country: US.
This item can be shipped to United States.