1867-80 9p bister, used in 1874 on cover from London to Bengal, departure cds alongside, sent via Southampton, "Sea Post Office E May:29" and various transit postmarks incl. Allahabad on reverse, also "Rec'd Dehree June 12" docketing, a well travelled cover (via Calcutta Line, London-Southampton-Gibraltar-Port Said-Suez-Aden-Madras to Calcutta by steamer and overland from Calcutta to Allahabad and points further on the Indian subcontinent
Die-proof printed in orange-yelloe on white glazed card
Panes
Wing margin stamps come from the center part of the sheet. In the pane shown above the left column of stamps have wing margins, There is no such thing as a straight edge perforated stamp in GB stamps.