2644
Air Mail cover 1925 (16 Feb.) Cobham's Anglo-Indian Survey flight, ½a. card carried from Calcutta to Delhi, cancelled by Havelock Square c.d.s. and showing Postage Due horseshoe h.s. and black on pink label alongside, signed by Arthur B. Elliott on reverse

细节
Air Mail cover 1925 (16 Feb.) Cobham's Anglo-Indian Survey flight, ½a. card carried from Calcutta to Delhi, cancelled by Havelock Square c.d.s. and showing Postage Due horseshoe h.s. and black on pink label alongside, signed by Arthur B. Elliott on reverse