Mr Hassfurther began his professional career as an antiques dealer, mostly concerned with books and manuscripts. As a high point of his career auctioning books and manuscripts, Mr H held an auction of 3,567 lots covering all collector fields in 1976, complete with some works of art. Further auctions and art exhibitions followed. A selection: The Walde Exhibition in 1978, ‘Alfons Walde 1891-1958. The Painter of Tyrollean Mountains, the New Objectivist, the Eroticist’, was the beginning of a chain reaction. The paper ‘Der Standard’ said: ‘Out of the top 10 Waldes, 9 of these have been auctioned at the Galerie Hassfurther over the last few years’. 1978/79: Frank Sedlacek 1872-1973. The Magical Realism of the New Objectivity, 100 exhibits. 1979: ‘Secession, Austrian Art 1880-1945’ was held at the Vienna Secession and was Hassfurther’s largest show with 313 works at auction and 366 works for sale. 1982: As part of the ‘Thomas Ender and Austrian Landscape Painting 1793-1875’ exhibition, 80 watercolours by Ender were auctioned at peak prices. 1984: Auction. The estate of Josef Floch 1894-1977. 1987: Auction ‘The House of Habsburg 1780-1860’, 424 works. 1989: ‘Vienna after 1945’, 180 lots. Auction at the Hilton Hotel. 1991: Rudolf von Alt 1812-1905 auction, ‘Vienna in Watercolour’. 1995: Sales Exhibition: ‘Wotruba 1907-1975 and His Students’ at the Innerer Burghof. 1996: Auction: ‘Archduke Johann. The Amateur Painter.’ 1996: Auction: ‘The House of Habsburg: Art and Manuscripts’, including Emperor Franz-Josef’s hand-written diary from 1844-1848. 159 lots. 2006: Large Herbert Boeckl 1894-1966 exhibition with items on loan from the Albertina and the Boeckl estate. 2009-2001: Mr Hassfurther doubled the auction prices for Oskar Mulley paintings (FAZ, Kunstmarkt)