1926 (2 Jan) Calcutta to Risalpur RAF flight, 1/2a green stationery card, with a photographic BY AIR vignette depicting an elephant and Aeroplane, violet "Hawasae / By Air" cachet, plus oval "27 Squadron / Royal Air Force", initialed by E.H Spence, hinge remnants on back, with "souvenir of Calcutta to Risalpur Air Flight" dated and initialed by Stephen Smith