Ottoman Post Offices in Greece: 1911 cover to Büyükada franked with 1pi. of 1909 Sultan Mohamed V tughra stamp for single weight one piastre letter rate tied by POLIROZ – POLYGROS (vilayet Selanik, GR #387, RR) bilingual datestamp and 11 September Prinkipo (Ile) arrival cds. Reverse same day Istanbul transit cds. 1999 TFDF certificate
