Türkische Post in Saudi Arabien, MEDINA : 1917 bilingual “SAHRA POSTASI 28” cds. (Uexkull fig.85) on registered fieldpost envelope to Constantinople showing on front “MUAYENE EDILMISDIR MEDINE-I MÜNEVVERE ASKERI SANSÜRLÜGÜ” military censor (Uexkull fig.86), this is one of three recorded fieldpost from Medina and the only registered usage, certificate Nakri 2014, fine and unique