Prepaid entire letter canc. "ΚΩΝΣΤΑΝΤΙΝΟΥΠΟΛΙΣ ΤΟΥΡΚΙΑ*19.ΑΠΡΙΛΙΟΥ.1852" in blue to Syros. Oval "ΔΠ", arr. "ΣΥΡΟΣ*22.ΑΠΡΙΛ.1852". Disinfection slits. On reverse handwritten prepaid postage "60" while on front handwritten "10" to be collected.