Air Mail cover 1930 (21 June) envelope carried on return flight of seaplanes S1419 and S1149 from Sandakan to Kudat, bearing 1925-28 $1 tied by framed "AIR MAIL/Aeroplane/NORTH BORNEO" and showing Sandakan c.d.s. alongside and, on reverse, Kudat (22.6) and Sandakan (27.6) datestamps. Photo