Spotted at San Francisco Museum of Modern Art. How sad is it that my first thought was how to ID the brush?
René Magritte Les valeurs personnelles (Personal Values), 1952; painting; oil on canvas, 31 1/2 in. x 39 3/8 in. (80.01 cm x 100.01 cm); Collection SFMOMA, Purchase through a gift of Phyllis Wattis;