
The datestamp (dt. 08.09.1915.) is of Br. FPO T52 which was located in Port Said from 07.25.1915. (Proud incorrectly records it 06.23.1915.

) to 10.10.1915. when it was sent to Thessaloníki, Ellada on 10.14.1915.
This datestamp was allotted to 52 (Lowland) Division Train (hence
T in
T52 denoted Division
Train) with 155, 156, 157 Brigades which used datestamps of FPO D.L.L. in 6/1915 and thereafter FPO T.L.L. till T52 ds was issued.
The Indian Expeditionary Force
PASSED BY CENSOR censor mark with Censor No. 102 (Firebrace type IEF3) was exclusively used by the Br. FPO T52 in Port Said.
References:
1.
British Empire Campaigns and Occupations in the Near East, 1914-1924 A Postal HistoryJohn A Firebrace.
Christie's-Robson Lowe, Bournemouth, England 1991
Chapter IV: British Infantry Divisions, Brigades and Battalions
Divisonal Trains; pp.26-7
Chapter V: British Infantry Divisions, Brigades and Battalions (cont.)
52 (Lowland) Division; pp.55-6
Chapter XXVIII: Military Censorship
Indian Censor Handstamps; pp.301, 303
2.
The Postal History of the British Army in World War I Before and after 1903 to 1929Alistair Kennedy and George Crabb.
private, Epsom, England 1977
Chapter XVII: Egypt. (Including Sudan, Palestine, Transjordan, Syria, Lebanon and Cicilia); p.155
3.
History of British Army Postal Service (Vol.II: 1903-1927)Edward Wilfrid Baxby Proud.
Proud-Bailey Company Limited, Brighton, England 1980
Part I
Chapter V: Egyptian Expeditionary Force; p.40
Part II: List of Offices
Chapter XIV: 2nd Series 22.1.15.-1920 FPOs
FPO T52; p.294
4.
Army and Field Post Offices of Egypt and the EEF, 1914-20Michael M Sacher.
The Royal Philatelic Society, London, London, England 1970
Appendix B: The Post Offices
Section 2: Field Post Offices; p.25