1918 (2.9.), Small size envelope endorsed "O.A.S." and franked with 2 copies 1917, ½ piaster scarlet, tied by superb strike of "EL-AKABA 2.9.9.116" cds. (as all the other known covers erroneously dated), addressed to Cairo with frontside arrival mark (SEP 12, 1918) and 2 different censor marks on front and reverse. A fine and extremely rare cover, merely a handful of entires are recorded from the city of Aquaba during the Hejaz period. Certificate Todd AIEP (2018) (SG 14) (Image)