Yves Klein, SE 161, Executed in 1959. photo courtesy Philips de Pury & Co Sponge, stone and metal. height: 17 3/8 in. (44.1 cm). Signed with initials and dated ‘YK 59’ (on the stone). ESTIMATE $700,000-900,000 PROVENANCE Galerie Iris Clert, Paris; Mr....