Joan Miró 

1969, Gouache, 15.8 x 34 cm, Singed at lower right

Pablo Picasso

1973, Watercolor and gouache on paper, 35 x 55 cm, 

Signed and dated at left

Andy Warhol

1975, Mixed media, 51 x 38 cm, Signed with initials, 

lower right022, Hanji, Bamboo, Steel, W400 x D450 x H600 (mm)

Georg Baselitz

1989, Watercolor, 21 x 52 cm