This lovely note was from the second issue of banknotes issued after Austria regained her nationhood in 1945. This note is similar to a similar to a 100 Schilling note that was dated 1936, but not issued, but which design was used by Germany after the Anschluss of 1938 for their
20 Reichsmark 1939 note which was used until 1945. This design, whilst lovely, was shortlived and was replaced in 1949 with a more modern design. This particular note is P-124 in the Krause catalog.