1859 Overseas mail. An envelope with original contents sent from Sible Hedingham, Essex addressed to 'Lt J M Kelsall, H.M.S. Cumberland, Rio de Janeiro or Elsewhere' bearing a 6d Pale lilac (SG 70) tied by a Halstead "334" numeral. Backstamped by a Sible-Hedingham UDC in blue, Halstead and London transit cds's for MY.7-9.1859.
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.