Apparently this photoscope, (a photobooth sans booth), was all the rage at the St. Louis Exposition. The ad above was found in the June 4, 1904 Ogden Standard (Ogden, UT).
The newest novelty in Nickel-in-the-Slot Machines. Takes your photograph, develops and delivers to you in one minute. The only Nickel-in-the-Slot Machine that aside from affording amusement gives permanent value for your money. Always a perfect likeness. Takes but a minute, costs 5 cents. Be sure to try the first one you see.
200 in operation at the St. Louis Exposition.
A Ballad for the Fair (1964)