As I have already mentioned, if my mother lost sight of my younger brother and I at the local Sears, Roebuck store on Santa Monica Blvd., she always knew where to look for us.
the pedascope
from retronaut
“Shoe-fitting fluoroscopes, also known as Pedoscopes, were X-ray fluoroscope machines installed in shoe stores from the 1920s until about the 1960s in the United States (by which time they were prohibited), and into the mid-1970s in the United Kingdom.”
the pedascope II
the pedascope III
note especially the 'Safety Seal' so let's relax people, this shouldn't be a problem.
the pedascope IV
the pedascope V
all images from retronaut