Unidentified person

This is the back of F73k_op1_ae2623_v001. Town Sofia. With text: "For a memory P. Darvingov". Text with pencil. Firm logo – photo studio "Iv. A. Karastojanov". Print text. 16,3 x 10,8 cm. Bulgarian language. Cardboard. Moistened end dry. Dirty. Original reference: BOX1; F73k_op1_ae2623_r001.