This ad for the Radio Trading Company, 100A Park Place, New York, appeared 85 years ago this month in the April 1934 issue of Short Wave Craft.  The top transmitter put out 15-30 watts, depending on tubes used, and retailed for $5.94.  This price included a set of coils for 160 meters, but did not include tubes.  Coils for other bands were also available.  The accompanying power supply sold for $7.98, but did not include the rectifier tube.

The transmitter at the bottom was for ten meters, and ran a dual triode push-pull.