The radios pictured on this page come from the Spring-Summer 1950 catalog. The 1949 lineup was also carried over, but I am still lacking information to know which models were carried over for sure. It appears that the 4-A-78/79 was a new entry for Spring-Summer 1950, as was the Spectator portable.
A mid-ranged console from 1949, apparently carried over to 1950. Note that the ad has no specific model number and is simply advertising any radio-phono (though the 4-A-62 is pictured).