19/06/2026
Viennese Grand Piano by Conrad Graf, Vienna, c. 1819-20, with quadruple stringing
Graf was regarded as one of the supreme makers and his instruments were owned by both Schubert and Beethoven; the latter’s was also quadruple strung. Later composers who owned or chose to play Graf instruments include Chopin, Schumann, Liszt and Mahler. This is one of the very few surviving Grafs with the quadruple-stringing, having four strings to a note, instead of the usual three, producing a fuller tone.