Registered cover fr. with 50c. cancelled with linear "POSTES SERBES" and posted from "MINISTARSKA*27.7.918" with Serbian censorship "CENSURE/MILITAIRE SERBE", via "BOLOGNA-POSTA ESTERA*14.8.18" and "MILANO-POSTA ESTERA*15.8.18" with Italian censorship "(119) VERIFICATO/PER CENSURA" and tape, arr. "GENEVE*3.IX.18".