Alexander Joseph Sefi (1889 in St. Pancras, London[1][2] – 10 October 1934, in Kensington, London[3][4]) was an English philatelist and stamp dealer who signed the Roll of Distinguished Philatelists in 1933.
[4][5] Sefi was educated at the Merchant Taylors' School.
Later, he spent three years conducting geological and scientific expeditions in Asia Minor, Syria and Arabia.
[2] In philatelic literature, his magnum opus was his masterful "An Introduction to Advanced Philately...", re-issued in facsimile form by the Royal Philatelic Society London in 2010.
Mortimer in preparing a book on Jammu-Kashmir which was eventually published in 1937.