Syria: French Administration, Airmail, 1921 (Sep 21), cover from Aleppo to Alexandria, franking includes gutter pair of 1p on 20c, only 3 known on cover. It appears the 21 of 21 Sep has reversed numerals and the receive mark is 13 Sep. A nice clean cover. Scott C4-6. SG 78-80. Estimate $500 - 750./