San Francisco Ballet continued to serve as the school's director until his retirement in 1975. In 1938, the company's first major production was "Coppélia", choreographed by Willam Christensen. In 1940, it staged "Swan Lake", the first time that the ballet was produced in its entirety by an American company. On Christmas Eve 1944, the company staged "Nutcracker"—the first complete production of Tchaikovsky's most popular piece ever danced in the United States. In 1942, San Francisco Opera Ballet split into two independent companies, ballet and opera. The ballet half was sold to Willam and Harold Christensen. Willam became artistic director, while Harold took on
San Francisco Ballet end of 1975 with "Nutcracker" and has met with both audience and critical acclaim ever since, becoming known by the 1990s as one of the world's finest ballet orchestras. SFBO toured with the SF Ballet's touring company from 1978 until 1984. It has accompanied many prestigious international ballet companies that have toured to the San Francisco Bay Area, including The Royal Ballet, the Royal Danish Ballet, Stuttgart Ballet, Hamburg Ballet,the Bolshoi Ballet, Paul Taylor Dance Company, American Ballet Theatre, and the Paris Opéra Ballet. In 1995, the orchestra took on the remarkable task of accompanying 13 international dance companies over