Relief É ponge bleu sans titre (RE 37)

Yves Klein (1928-1962) Relief Éponge bleu sans titre (RE 37) signed, inscribed with the artist's star monogram and dated ‘* Yves 59’ (on the reverse) dry pigment and synthetic resin on natural sponges, on board 10 7/8 x 13 ¾ x 4 1/8in. (27.7 x 35 x 10.4cm.) Executed in 1959