Team
Slightly different but hopefully will be of interest
By 1922 when this cover was posted through the Turkish Nationalist postal system British Military interests were represented in Turkey by British and Indian Troops served by the Indian Field Postal Service. In May 1922 in what became known as the 'Chanak Crisis' British troops returned to the Dardanelles and Constantinople areas, remaining until September 1923 That's another story however.
Scan shows a commercial cover from Samson on the Black Sea coast to Galata, Constantinople. Franked with a Turkish currency stamp. I not sure if the Purple oval mark is a receiving mark or a later version of the War time Censor marks.
Chris