Engineer anaglyph 3D
ANAGLYPH, conversion of original Realist format stereo transparency in my collection. The following is written on the slide: "49-5 OH, TO BE AN ENGINEER. by Glen Thrush, APSA. Denver 1, Colorado, U.S. A."
This image views in 3D when wearing RED/CYAN 3D glasses. More images of this type can be found by searching "anaglyph"