I think what I have is a Scott #P68 with 2 overprints. One changes the value from 2 paras to 5. The other looks to celebrate the Coronation of Mehmed VI in 1918. I got that info from Wiki and StampWorld.com. I can not find it in Scotts so I must be wrong. Any ideas where else I could look for it. I followed all the 1909 Dec overprint leads to no avail.