Details on the last of the Imp-Mod lots are coming out as the catalogues emerge and get printed. Sotheby’s has a few lots like this Monet water lilies work that was stamped by his heirs with the painter’s signature.

The first owner held it for 64 years until it was sold at Christie’s in 1989 at the peak of the Japanese-fueled Impressionist art binge. It was then sold privately twice, in quick succession in 1999 and 2000.