Released on the 4-In-1 label, that put out 78 RPM EP's in the early 1930s with double playing time but no noticeable drop in quality or loudness! As far as I know these songs were especially recorded for this label, no rereleases. Twelve Rhythm Monarchs = Ray Starita's Ambassadors.
More in my 78 RPM RECORDS RESCUED FROM OBLIVION playlist: 78 rpm records from my own (small) collection, self-ripped, not available on youtube or in any other digital form before, and all good stuff!