145: FOUR EARLY 20TH CENTURY STEREOSCOPES

Includes a Keystone No. 50 Home Training Stereoscope with original box, all parts present according to the instructions pasted to the inside of the box lid. Also includes a Bioptor by Stereo Optical Company, Chicago, with plastic and aluminum parts, and a wood stereoscope with loose barrel. Plus an unmarked example in light wood, with square oculars. Largest measures 12 x 8.25 x 6.75 inches.

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Good condition overall.
$150 - $200