Sotheby’s is preparing to bring works from the collection of the late dealer and financier Robert Mnuchin to auction this May in New York, adding a fresh trove of blue-chip material to a season the house hopes will build on its blockbuster November and a strong start to the spring sales.

The consignment is made up of 24 works from the personal collection Robert assembled with his wife Adriana Mnuchin, long known among collectors for its focus on museum-quality examples of postwar abstraction and modern art.