A hundred years ago this month, this illustration appeared on the cover of the August 1923 issue of Radio News. Most radio listeners had graduated beyond the crystal set, but this gentleman purports to have a super crystal set that can not only pull in a station 2000 miles away, but provide loudspeaker volume.

His friend is apparently convinced, but he doesn’t see the man’s confederate under the table, actually pulling in the program with a modern vacuum tube set.