String quartet ensemble in existence from 1917 to 1967. It was originally formed by three Hungarians and a Dutchman; at the end, the quartet consisted of four Russians.
1st violin:
Emil Hauser (1893–1978) (from 1917 to 1932)
Josef Roisman (Joe) (1900–1974) (from 1932 to 1967)

2nd violin:
Alfred Indig (1892–?) (from 1917 to 1920)
Imre Pogany (1893–1975) (from 1920 to 1927)
Josef Roisman (Joe) (1900–1974) (from 1927 to 1932)
Alexander Schneider (Sasha) (1908–1993) (from 1932 to 1944 and from 1955 to 1967)
Edgar Ortenberg (1900–1996) (from 1944 to 1949)
Jac Gorodetzky (1913–1955) (from 1949 to 1955)

Viola:
István Ipolyi (1886–1955) (from 1917 to 1936)
Boris Kroyt (1897–1969) (from 1936 to 1967)

Cello:
Harry Son (born Henri Mozes Son) (1880–1942) (from 1917 to 1930)
Mischa Schneider (1904–1985) (from 1930 to 1967)