"USSR Russische Ausstellung" by El Lissitsky, 1929. Note that the boy and girl share an eye, as in traditional <a href="//commons.wikimedia.org/wiki/Category:Three_faces_on_one_head" title="Category:Three faces on one head">three faces on one head</a> depictions...
<bdi><a href="https://en.wikipedia.org/wiki/en:El_Lissitzky" class="extiw" title="w:en:El Lissitzky"><span title="Soviet artist, designer, photographer, teacher, typographer and architect (1890–1941)">El Lissitzky</span></a>
</bdi>
1929
<ul><li><a rel="nofollow" class="external free" href="https://www.culture.ru/persons/9437/el-lisickii">https://www.culture.ru/persons/9437/el-lisickii</a></li>
<li><a rel="nofollow" class="external free" href="https://artchive.ru/artists/65361~El_Lisitskij/works/516099~Plakat_dlja_Russkoj_vystavki_v_Muzee_dekorativnoprikladnogo_iskusstva_v_Tsjurikhe_1929_god">https://artchive.ru/artists/65361~El_Lisitskij/works/516099~Plakat_dlja_Russkoj_vystavki_v_Muzee_dekorativnoprikladnogo_iskusstva_v_Tsjurikhe_1929_god</a></li></ul>