To learn more about collecting vintage stereoscopes and to see other great 3D viewer collections:

• 20th Century Stereo Viewers

• André Ruiter

• Foticos Collection

• Optical Toys

• Stereosite

• Stereoskopie

And for some stereoscopy history lessons, check these out:

• 3D Legends

• Brooklyn Stereography

• Le Cartoscope’s Interactive History

• The Stereoscopy Blog