1837 music from ca 1930, with typical sound, 1840 'jingle' Radio Berlin, song
1942 song in German, sounding like a 78 rpm record, 1945 this one in English, with accent, could be Maurice Chevalier ?, ending by just chatting and singing again, 1949 singer in English, from musical comedy, signal fading down, 1951 etc, no ID heard so far,but no doubt...