Starting from the top left - first two are the "ET" overprint of 1916, a time when the Greek state was split in two, these were issued by the Athens government, the overprint means Hellenic Posts and incorporates the Greek crown.
Next two are both Thrace, first is 1920 overprint on 1912-9 Greek stamp, second is same year but three word overprint. Both overprints refer to High Commission of Thrace.
The next three are all from the "Winds" airmail set part 1, issued 1942.
Next is a 1917 Provisional Government issue, followed by a 1918 "new" lithographic issue. Your last 5 are all postage dues, they look like they are all from the 1913-28 lithographic issue.
Hope this helps.
Posted 02/18/2012 04:51 am
