Portrait of young boy in plaster/wooden frame 1916 ​

Charming portrait of young boy. Painted on cardboard. Signed by the artist in the lower right corner in 1916. The frame, which is made of wood and plaster, has damage in the lower left corner. Also minor defect in the top left corner. Measurements including the frame: 26.5 x 31 cm. Without frame: 16 x 21 cm.