Premise: Empire Builders is an American old-time radio Western. It was broadcast on NBC-Blue from January 14, 1929, to June 22, 1931. The reference book "Radio Rides the Range: A Reference Guide to Western Drama on the Air" commented, "This may have been the first western drama on radio; it certainly was one of the most unique."
Hypothesis: "Empire Builders" was broadcast on NBC-Blue from January 14, 1929, to June 22, 1931 on a daily basis, except for October 1929.