Via the always outstanding Sunday Links from Nag on the Lake, we are introduced to the predecessor to the Walkman and the earbud in the dual tube radio fitted into a pith helmet debuted in March 1949 by inventor Victor Hoeflich—most of whose work consisted of novelty items and making the Hawai’ian lei more ubiquitous through his machine that churned out paper versions of the traditional wreath. Aggressively advertised and memorable, the mobile device did not sustain sales nor attract and retain early adopters with the marketing campaign winding down the following year. With the development of the transistor, pocket radios would become possible some five years later. Much more at the links above.