Louis Marcoussis, Zither, Bottle, Pipe and Sheet Music, 1919, Watercolor, oil, gouache, ink, and pencil on paper, The Museum of Modern Art, New York. https://dartabase.art/cite/moma/35042

Pierre Theunis, Namur Hrave les Autrichiens, 1913 (1914?), bronze; 2 3/4 in. (7.0 cm.) diam., Smithsonian American Art Museum, Washington, D.C. https://dartabase.art/cite/smithsonian/ld1-1643381040022-1643381055260-1