This ad for the tiny Zenith Royal 50 appeared in a 21st of November 1960 edition of Life Magazine. Below is a similar ad that appeared in a Feb 1961 edition of Ebony Magazine.
Note the relatively high price of the Royal 50; $29.95 at a time when pocket transistor radio prices were plummeting due to the mounting pressure of imports from Japan. These are beautiful radios, see them here.