These are stereoviews (3D Images) taken in 19th and early 20th century Japan. A stereoview is two nearly identical images that, when seen through a special viewer, appear 3-dimensional. These animated GIFs mimic the effect by cycling between the images in quick succession.
(Here are Geishas looking at Stereoviews)
Foun on Pink Tentacle
Submitted by CT Kovalik