Sotheby's says together they could bring USD 78 million to USD 110 million at its May 5 sale of impressionist and modern art.
A 1905 example from Monet's "Water Lilies" series that's been in private hands since 1955 is estimated to bring USD 30 million to USD 45 million.
A 1908 painting of Venice has a pre-sale estimate of USD 15 million to USD 20 million. The Nazis had confiscated the painting but the son of noted collector Jakob Goldschmidt got it back in 1960. It is now being sold from the collection of his late grandson.