Like new in original box with note explaining the prism. The lens gives 24 upright images of anything viewed. The bell-shaped casing is made from layers of dyed birch, laminated together with a special method. the brass ring is signed and dated.  "1987, Dragonfly, Van Cort Instruments, Inc." Fun to look at objects!   Originally sold at "Kann Imports" in Guttenberg, IA

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