This 2.50 Schilling commemorative stamp from the Republic of Austria was issued in 1979 to honor August Musger (1868–1929), an Austrian priest, physicist, and inventor. Musger is celebrated as a pioneer of slow-motion film technology (“Pionier der Zeitlupentechnik”). The design by Otto Zeiller features a finely engraved portrait of Musger, with a diagram in the background symbolizing his optical principles. Printed by the Austrian State Printing Office, the stamp pays tribute to his revolutionary work that laid the foundation for modern motion picture analysis.