Tuvalu 763-766, 767 ad sheet SPECIMEN, MNH, $9.75. Michel 793-796, 797-800 Bl.63. Royal Air Force, 80th Ann. 1998. Hawker Woodcock, Vickers Victoria, Bristol Brigand, De Haviland DHC 1 Chipmunk. Sopwith Pup, Armstrong Whitworth FK8, North American Harvard, Vultee Vengeance.