1911 FIRST OFFICIAL U.K. AERIAL POST/LONDON POST CARD IN OLIVE-GREEN SIGNED BY THE PILOT "GRESWELL". Very fine used London post card in olive-green from London to Gwbert on Sea (Cardiganshire) with KGV ½d Downey cancelled good large part strike FIRST UNITED KINGDOM/AERIAL POST LONDON date stamp SP 9 1911 die 3. At left fine signature "C. H. Greswell" one of the four pilots. This example a very scarce usage to Wales. (Ref 102826).