Greece. (British Army Post Office In Kalamaria). 1918. Stamp-less envelope headed (On His Majesty's Service) addressed to 'Sir Charles de Graz, Corfu' cancelled by 'Army Post Office S.X. 4' double ring '31st Oct 18' with /Base Army Post Office/ X' and 'Army Post office S.X. 10' on reverse 'Nov 2nd' in Corfu. Rare item from the British Army Post Office in Kalamaria. Sir Charles Graz was British Minister to the Exiled Government in Corfu.