Cover franked with 25 lep. "ET" and cancelled with "ΚΕΡΚΥΡΑ (ΑΠΟΣΤΟΛΗ) 9 ΑΠΡ.19" to Constantinople. Cds "ΣΤΡΑΤ. ΤΑΧΥΔΡΟΜΕΙΑ 920 29 ΑΠΡ.19" and censored triangle "M.A 25" (letter included but routhlty opened)