This is the back of F73k_op1_ae2724_v018. Text with pencil: "22nd Artillery Regiment - General Slavchev orbits positions Belasitza". Belasitsa mountain. 12,5 x 17,5 cm. Bulgarian language. Paper. Asymmetrically cut. Dirty. Original reference: BOX3; F73k_op1_ae2724_r018
