Military order, parades on the front, and prayers to parts of 11 Infantry Division

This is the back of F73k_op1_ae2800_v025. Text with ink: 61 Infantry Regiment serves a prayer by case the birthday of His High Crown Prince. 17,5 x 12,5 cm. Bulgarian language. Paper. With spots. Original reference: BOX3; F73k_op1_ae2800_r025.