Antique Stereoscope 

 3D Photo Viewer

 58 Stereoview 3D Photo Cards 

The viewer is by Underwood New York no date it says Paten applied for

Comes with 58 antique 3D stereoview cardboard photo cards varying in subject matter from, children, farms, 

Monte Carlo, California, Japan, Scotland, New York, Egypt, Russia, Austria. ETC.

 Most are sepia and 3 are colorized