Self proclaimed to be one of the most interesting and novel inventions at the St. Louis World’s Fair of 1904. And it was...

This photoscope (a photobooth sans booth) would take a photograph, develop it, and produce a picture in a minute. All for a nickel. It was a big hit at the fair. 200 in operation at the St. Louis Exposition.

Here are more ads of this device from 1904.