First World War

This is the back of F120k_op1_ae1058_v008. Text with pencil: "Observation point." 18 x 12,3 cm. Bulgarian language. Paper. Folded and torn edges. Dirty. Patches. Faded text. Crushed. Asymmetrically cut. Original reference: BOX6; F120k_op1_ae1058_r008.