A spin-off of Rundfunk, with shorter caps and ascenders. Comes with an alternate ‘S’. There is also a Radio-Versal, which appears to be an all-caps variant of Rundfunk, with horizontal stripes. [Reichardt/Hoefer] Radio is shown in the 1930 addendum to Seemann’s Handbuch der Schriftarten. [Wetzig 1926]