[4] A violin-playing prodigy, he performed in the major cities of the Ottoman Empire at the age of seven; he once played in Constantinople for the Sultan Abdul Hamid II, who gave him five parrots as a reward.
In the 1920s, Weissgerber made concert tours through the Weimar Republic, during which the composer Rudolf Wagner-Régeny accompanied him at the piano.
[10] After the Machtergreifung by the Nazis, when he was only allowed to perform at events of the Kulturbund Deutscher Juden, he played for the label "Lukraphon", which was exclusively for Jewish artists.
[11] The owner was called Moritz Lewin and had his business premises in Berlin at Friedrichstrasse 208 and Grenadierstrasse 28, cf.
In 1936, he followed his two years younger brother Joseph (1902–1954), who had played as principal cellist with the Dresden Philharmonic and had already left Germany in 1933,[13] to emigrate to Palestine.
A sound film, Shir Ivri (Hebrew Melody), (1935)[16] which was produced at this time with his participation for the Reichsverband der jüdischen Kulturbünde in Deutschland, had only recently been found among his brother's estate[17] and has since been re-released.