Wikipedia
Reichs-Rundfunk-Gesellschaft
The Reichs-Rundfunk-Gesellschaft (RRG) (Reich Broadcasting Corporation) was a national network of German regional public broadcasting companies active from 1925 until 1945. RRG's broadcasts were receivable in all parts of the country and were used extensively for Nazi propaganda after 1933.
Historical recordings of RRG broadcasts are today held by the German Broadcasting Archive.