A rare Archibald Quincy Jones estate in Trousdale—an exclusive enclave of Beverly Hills—is now on the market. The modernist architect and University of Southern California professor, better known as Quincy, designed more than 5,000 commercial and residential projects in his 42-year career, including numerous single-family residences in Los Angeles that were built during the heyday of Hollywood glamour. Like most of the midcentury estates in the area, many of Jones’s projects have been significantly altered or …