[Arran]

If it is a Pacific radio, and not a "Plant A" radio, or something else. There were a number of independents cranking out generic sets, with private label names, for smaller retail chain stores and the like. I have one that is a four tube TRF AC/DC with a ballast tube, sensitivity isn't bad but selectivity is crap with only a two gang tuning condenser. "Rex" is Latin for king, so nothing really of note there, but the planet in the center might be a lead, there are also ones that say "Aetna" with the mountain in the dial, a volcano in Italy, I think that the latter were sold in Walgreens.
Regards
Arran