cover 1903 (25 Feb.) XU5 to Ordnance Depot Aden, marked "No stamps available, Field Service", showing circular-framed "T", small oval-framed "ADEN/UNPAID" d.s. in green (crossed by tear caused through opening) and horseshoe "ADEN/DUE AS." h.s. with manuscript "½" inserted. Scarce. Photo