On Wikipedia https://en.wikipedia.org/wiki/Raschèr_Saxophone_Quartet
Alternative Spellings Raschèr Quartet, RSQ
Creation 1969
Links Discogs

The Quartet has appeared at major concert halls in Europe and the United States, including Carnegie Hall and Lincoln Center in New York City, the Kennedy Center in Washington, D.C., Opera Bastille Paris, Royal Festival Hall in London, Philharmonie Cologne, Concertgebouw, Schauspielhaus Berlin, Berliner Philharmonie, Musikverein Vienna, Tonhalle Zürich. wikipedia