Recorded in Stockholm, April 1, 1939 (tracks 1, 2), October 1939 (tracks 3 to 6), January 23, 1940 (tracks 7 to 10), April 1940 (tracks 11, 12), May 23, 1940 (tracks 13 to 15), July 1940 (tracks 16 to 18), October 23, 1940 (tracks 19 to 22), November 1940 (track 23), December 1940 (tracks 24, 25) and May 1941 (tracks 26, 27). Ove Rönn's participation is missing from track listing, but mentioned in booklet notes.