In this ad Regency touted the TR-1 as being the worlds first pocket radio. It was of course the worlds first commercially released transistor radio but it was not the worlds first pocket radio. Pocket size crystal radios were built by hobbyists in the 1920's and in the mid 1940's the Belmont Boulevard was released. It was a pocket size, earphone only radio that ran on sub-miniature tubes.
Regency also claims in this ad that the Regency TR-1 was "virtually service free... engineered for lifetime performance" Sadly this was not true...
Here is an interesting mock-up of this ad!