regency: Pocket Radio; Regency TR-1 - Early announcement
I found this announcement of the coming Regency all transistor radio in Electronics, November 1954. The article can be interesting, since it gives a list of manufacturers that developed most of the required special components.
By the way, one month before, in the October issue of the same magazine, there was another announcement of a ready to come all transistor radio. Raytheon exhibited a solid state radio, an experimental prototype, given to the Massachusetts Governor.