Ottoman Turkey – Military: 1915 (23 August). Cover to Istanbul franked with 1pi pictorial for single weight one piastre letter rate and 10pa pictorial for war orphans tax tied by Sahra Postasi 35 field post office datestamp and 4 September Besiktas 3 arrival cds. Reverse same day Constantinople machine cancel. FPO 35 used by the 3rd Army at Eastern Front at that time.
